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 following number would be 10,000,000, or 10 million.
1 billion
One trillion :1,000,000,000,000 on the US (short scale): 1 x 1012
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.
Number 191 (one hundred ninety-one) comes after 190 (one hundred ninety), but before 192 (one hundred ninety-two). The sequence is as follows: 190, 191, 192.
The following number would be 10,000,000, or 10 million.
1 billion
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 trillion one million is the next whole number after one trilion nine hundred ninety nine thousand and ninety nine.
One trillion :1,000,000,000,000 on the US (short scale): 1 x 1012
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.
One Quadrillion.
Number 191 (one hundred ninety-one) comes after 190 (one hundred ninety), but before 192 (one hundred ninety-two). The sequence is as follows: 190, 191, 192.
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
10,000,000 - 1 = 9,999,999 nine million, nine hundred and ninety-nine thousand, nine hundred and 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.
Many numbers come after 999 but the number that comes directly after it is 1,000.