101,000,000,000
0.165
12112 or 12 112
One billion.
Ways to write one billion is: one billion,1 billion,1,000,000,000,you can write it in roman numeral several different ways,with tally marks, etc.
One quintillion.
1.billion
To write one billion three million, you would write out the number 1,003,000,000.
You can write out 1.8 billion as "1,800,000,000" or "one billion eight hundred million."
As a number: 1,000,000,000 = one billion
1,000,000,001
1 and one half billion can be written as 1.5 billion.
one billion