As posed, the question cannot be answered.
While 4 million is the next integer, there are other numbers - an infinity of them - between 3,999,999 and 4,000,000.
If you're counting down, then the next integer (whole number) is "a hundred million nine hundred ninety-nine thousand nine hundred ninety-eight". If you're counting up, then the next integer is "two hundred million".
One Quadrillion.
One trillion one million is the next whole number after one trilion nine hundred ninety nine thousand and ninety nine.
10,000,000 - 1 = 9,999,999 nine million, nine hundred and ninety-nine thousand, nine hundred and ninety-nine
The value of one million is that it tells us what comes after nine hundred and niney nine thousand, nine hundred and ninety nine, when we are counting.
If you're counting down, then the next integer (whole number) is "a hundred million nine hundred ninety-nine thousand nine hundred ninety-eight". If you're counting up, then the next integer is "two hundred million".
The following number would be 10,000,000, or 10 million.
One Quadrillion.
One trillion one million is the next whole number after one trilion nine hundred ninety nine thousand and ninety nine.
10,000,000 - 1 = 9,999,999 nine million, nine hundred and ninety-nine thousand, nine hundred and ninety-nine
One trillion :1,000,000,000,000 on the US (short scale): 1 x 1012
The number that comes after nine hundred ninety nine million nine hundred ninety nine thousand nine hundred ninety nine is one billion. In numerical terms, this is represented as 1,000,000,000. This is because after reaching the maximum value of 999,999,999, the next number in the sequence follows the pattern of adding one to the billions place while resetting all other digits to zero.
9 hundred 99 million and 1 (999000001) :) but you probably meant what comes after 9 hundred 99 million 9 hundred 99 thousand 9 hundred 99? (999999999) that would be 1 billion (1000000000)
The value of one million is that it tells us what comes after nine hundred and niney nine thousand, nine hundred and ninety nine, when we are counting.
1 999 999 999 999 999 Or, written out, 1 quadrillion, nine hundred ninety nine trillion, nine hundred ninety nine billion, nine hundred ninety nine million, nine hundred ninety nine thousand, nine hundred ninety nine
999,999,999,999,999,999,999,999,999,999,999 + 1 = one decillion. The number you wrote is nine hundred ninety nine nonillion, nine hundred ninety nine octillion, nine hundred ninety nine septillion, nine hundred ninety nine sextillion, nine hundred ninety nine quintillion, nine hundred ninety nine quadrillion, nine hundred ninety nine trillion, nine hundred ninety nine billion, nine hundred ninety nine million, nine hundred ninety nine thousand, nine hundred ninety nine.
Nine hundred ninety-nine novemdecillion, nine hundred ninety-nine octodecillion, nine hundred ninety-nine septendecillion, nine hundred ninety-nine sexdecillion, nine hundred ninety-nine quindecillion, nine hundred ninety-nine quattuordecillion, nine hundred ninety-nine tredecillion, nine hundred ninety-nine duodecillion, nine hundred ninety-nine undecillion, nine hundred ninety-nine decillion, nine hundred ninety-nine nonillion, nine hundred ninety-nine octillion, nine hundred ninety-nine septillion, nine hundred ninety-nine sextillion, nine hundred ninety-nine quintillion, nine hundred ninety-nine quadrillion, nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine and one.