Q: Is 21,121,100 a Composite Number?

Why is 21,121,100 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,121,100 can be evenly divided by 1 2 4 5 7 10 11 13 14 20 22 25 26 28 35 44 50 52 55 65 70 77 91 100 110 130 140 143 154 175 182 211 220 260 275 286 308 325 350 364 385 422 455 550 572 650 700 715 770 844 910 1,001 1,055 1,100 1,300 1,430 1,477 1,540 1,820 1,925 2,002 2,110 2,275 2,321 2,743 2,860 2,954 3,575 3,850 4,004 4,220 4,550 4,642 5,005 5,275 5,486 5,908 7,150 7,385 7,700 9,100 9,284 10,010 10,550 10,972 11,605 13,715 14,300 14,770 16,247 19,201 20,020 21,100 23,210 25,025 27,430 29,540 30,173 32,494 36,925 38,402 46,420 50,050 54,860 58,025 60,346 64,988 68,575 73,850 76,804 81,235 96,005 100,100 116,050 120,692 137,150 147,700 150,865 162,470 192,010 211,211 232,100 274,300 301,730 324,940 384,020 406,175 422,422 480,025 603,460 754,325 812,350 844,844 960,050 1,056,055 1,508,650 1,624,700 1,920,100 2,112,110 3,017,300 4,224,220 5,280,275 10,560,550 and 21,121,100, with no remainder.

Since 21,121,100 cannot be divided by just 1 and 21,121,100, it is a composite number.

More Examples

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