Q: Is 202,121,200 a Prime Number?

Why is 202,121,200 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 202121200 can be evenly divided by 1 2 4 5 8 10 16 20 25 40 50 80 100 101 200 202 400 404 505 808 1,010 1,616 2,020 2,525 4,040 5,003 5,050 8,080 10,006 10,100 20,012 20,200 25,015 40,024 40,400 50,030 80,048 100,060 125,075 200,120 250,150 400,240 500,300 505,303 1,000,600 1,010,606 2,001,200 2,021,212 2,526,515 4,042,424 5,053,030 8,084,848 10,106,060 12,632,575 20,212,120 25,265,150 40,424,240 50,530,300 101,060,600 and 202,121,200, with no remainder.

Since 202,121,200 cannot be divided by just 1 and 202,121,200, it is not a prime number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).