A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2201100 can be evenly divided by 1 2 3 4 5 6 10 11 12 15 20 22 23 25 29 30 33 44 46 50 55 58 60 66 69 75 87 92 100 110 115 116 132 138 145 150 165 174 220 230 253 275 276 290 300 319 330 345 348 435 460 506 550 575 580 638 660 667 690 725 759 825 870 957 1,012 1,100 1,150 1,265 1,276 1,334 1,380 1,450 1,518 1,595 1,650 1,725 1,740 1,914 2,001 2,175 2,300 2,530 2,668 2,900 3,036 3,190 3,300 3,335 3,450 3,795 3,828 4,002 4,350 4,785 5,060 6,325 6,380 6,670 6,900 7,337 7,590 7,975 8,004 8,700 9,570 10,005 12,650 13,340 14,674 15,180 15,950 16,675 18,975 19,140 20,010 22,011 23,925 25,300 29,348 31,900 33,350 36,685 37,950 40,020 44,022 47,850 50,025 66,700 73,370 75,900 88,044 95,700 100,050 110,055 146,740 183,425 200,100 220,110 366,850 440,220 550,275 733,700 1,100,550 and 2,201,100, with no remainder.
Since 2,201,100 cannot be divided by just 1 and 2,201,100, it is not a prime number.