A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4968012 can be evenly divided by 1 2 3 4 6 7 12 14 17 21 28 34 42 49 51 68 71 84 98 102 119 142 147 196 204 213 238 284 294 343 357 426 476 497 588 686 714 833 852 994 1,029 1,207 1,372 1,428 1,491 1,666 1,988 2,058 2,414 2,499 2,982 3,332 3,479 3,621 4,116 4,828 4,998 5,831 5,964 6,958 7,242 8,449 9,996 10,437 11,662 13,916 14,484 16,898 17,493 20,874 23,324 24,353 25,347 33,796 34,986 41,748 48,706 50,694 59,143 69,972 73,059 97,412 101,388 118,286 146,118 177,429 236,572 292,236 354,858 414,001 709,716 828,002 1,242,003 1,656,004 2,484,006 and 4,968,012, with no remainder.
Since 4,968,012 cannot be divided by just 1 and 4,968,012, it is not a prime number.