How do you write one thousand millions?

Answer 1

One million thousands is the same as one thousand millions; both equal a billion (US reckoning) or a milliard (UK reckoning).

Written out, this would be 1,000,000,000.

Answer 2

One thousand million is one billion (in the US). One thousand is 1,000 and one million is 1,000,000 so if we have 1,000 of the 1,000,000s, we'll have 1,000,000,000 or one billion. We could also write it 109 and be correct.

Answer 3

1,000,000,000

Normally called a billion.