Twelve thousand seven hundred written in numerals is 12, 700. This has 5 digits.
Seven million forty seven thousand twelve is 7,047,012.
It is 406012.
Two billion, one hundred twelve million, nine hundred twelve thousand.
Ten million five hundred twelve thousand and fifteen as a numeral is 10,512,015
This is how you write six billion two hundred million twelve thousand six: 6,200,012,006
Well, you might add 12000 + 1200 + 12, but that is not the normal way to name this number. Usually you say "twelve hundred" if there are no higher digits.
516312000 = 516,312,000
Twelve million, five hundred thousand, three hundred.
One million, two hundred thousand, two hundred three.
1,200,000,000 or 1.2 billion
12,272,702 is twelve million, two hundred seventy-two thousand, seven hundred and two.
Four billion, seven hundred two million, eight hundred twelve thousand, forty-three
Twenty one million eight hundred thousand ten thousand two thousand seven hundred and twenty three
Twelve million, thirty thousand, two hundred.
Twelve million, five hundred thousand.