521 = DXXI
I write 620 billion as 620 billion.
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
40,300,000,000
Five hundred and twenty one billions or billion In scientific notation it is: 5.21*1011
521 = DXXI
It is 521.
52.1 as a fraction is 521/10
I write 620 billion as 620 billion.
521/1000
Sixteen point two billion is how I would write it.
You write 3.56 billion as 3,560,000,000.
40,300,000,000
As a number it is: 1,800,000,000 = 1.8 billion
Since you asked how I would write the number, the answer is 1031.
1,000 billion billion is: 1,000,000,000,000,000,000,000