2,531,000,001. And- plus- you add commas, like this: two billion, five hundred thirty-one million, one. Just remember your number places. Ones, Hundreds, Thousands, Millions, Billions, Trillions, and SO on!
30,300,030,303.
4,230,000,000
3,600,030,000
4,000,230,000
3,600,030,000
3,436,000,000
35,206,309,000
14,132,000,759
38,541,074,802 = thirty-eight billion, five hundred forty-one million, seventy-four thousand, eight hundred and two.
thirty-two billion,five hundred million,
32500000000 = thirty-two billion five hundred million
40,139,000,059