Q: Is 21,120,138 a Prime Number?
A: No, 21,120,138 is 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 21120138 can be evenly divided by 1 2 3 6 9 13 18 26 39 43 78 86 117 129 234 258 387 559 774 1,118 1,677 2,099 3,354 4,198 5,031 6,297 10,062 12,594 18,891 27,287 37,782 54,574 81,861 90,257 163,722 180,514 245,583 270,771 491,166 541,542 812,313 1,173,341 1,624,626 2,346,682 3,520,023 7,040,046 10,560,069 and 21,120,138, with no remainder.
Since 21,120,138 cannot be divided by just 1 and 21,120,138, it is not a prime number.
| Number | 21,120,136 | 21,120,137 | 21,120,139 | 21,120,140 |
| Prime? | no | no | yes | no |