Q: Is 1,221,220 a Prime Number?
A: No, 1,221,220 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 1221220 can be evenly divided by 1 2 4 5 7 10 11 13 14 20 22 26 28 35 44 52 55 61 65 70 77 91 110 122 130 140 143 154 182 220 244 260 286 305 308 364 385 427 455 572 610 671 715 770 793 854 910 1,001 1,220 1,342 1,430 1,540 1,586 1,708 1,820 2,002 2,135 2,684 2,860 3,172 3,355 3,965 4,004 4,270 4,697 5,005 5,551 6,710 7,930 8,540 8,723 9,394 10,010 11,102 13,420 15,860 17,446 18,788 20,020 22,204 23,485 27,755 34,892 43,615 46,970 55,510 61,061 87,230 93,940 111,020 122,122 174,460 244,244 305,305 610,610 and 1,221,220, with no remainder.
Since 1,221,220 cannot be divided by just 1 and 1,221,220, it is not a prime number.