How do you write 1000 million dollars in numbers?

To write 1000 million dollars in numbers, you would write it as $1,000,000,000. This is because "million" is equivalent to 1,000,000, so when you multiply 1,000 by 1,000,000, you get 1,000,000,000. In numerical form, this is represented by the digits 1, followed by 9 zeros.