Q: Is 121,211,200 a Prime Number?

Why is 121,211,200 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 121211200 can be evenly divided by 1 2 4 5 8 10 11 16 20 22 25 32 40 44 50 55 64 71 80 88 97 100 110 142 160 176 194 200 220 275 284 320 352 355 388 400 440 485 550 568 704 710 776 781 800 880 970 1,067 1,100 1,136 1,420 1,552 1,562 1,600 1,760 1,775 1,940 2,134 2,200 2,272 2,425 2,840 3,104 3,124 3,520 3,550 3,880 3,905 4,268 4,400 4,544 4,850 5,335 5,680 6,208 6,248 6,887 7,100 7,760 7,810 8,536 8,800 9,700 10,670 11,360 12,496 13,774 14,200 15,520 15,620 17,072 17,600 19,400 19,525 21,340 22,720 24,992 26,675 27,548 28,400 31,040 31,240 34,144 34,435 38,800 39,050 42,680 49,984 53,350 55,096 56,800 62,480 68,288 68,870 75,757 77,600 78,100 85,360 106,700 110,192 113,600 124,960 137,740 151,514 155,200 156,200 170,720 172,175 213,400 220,384 249,920 275,480 303,028 312,400 341,440 344,350 378,785 426,800 440,768 550,960 606,056 624,800 688,700 757,570 853,600 1,101,920 1,212,112 1,249,600 1,377,400 1,515,140 1,707,200 1,893,925 2,203,840 2,424,224 2,754,800 3,030,280 3,787,850 4,848,448 5,509,600 6,060,560 7,575,700 11,019,200 12,121,120 15,151,400 24,242,240 30,302,800 60,605,600 and 121,211,200, with no remainder.

Since 121,211,200 cannot be divided by just 1 and 121,211,200, 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).