12. (10 points) Grandpa Hua Luogeng was born on November 12, 1910. Arrange these numbers into an integer, and factorize it as $19101112=1163 \times 16424$. Are either of the numbers 1163 and 16424 prime? Please explain your reasoning.
12. (10 points) Grandpa Hua Luogeng was born on November 12, 1910. Arrange these numbers into an integer, and factorize it as $19101112=1163 \times 16424$. Are there any prime numbers among 1163 and 16424? Please explain your reasoning.
【Analysis】According to the concept of composite numbers, it is easy to determine that 16424 is a composite number. Then, determine whether 1163 is a prime number. The method is explained in the solution.
【Solution】Solution: 16424 is a composite number, the reason being that 16424 has more than two divisors, in addition to 1 and itself, it also has 2, 4, etc.
1163 is a prime number. The method to determine this is: $35^{2}=1225, 34^{2}=1156$, which are closest to 1163, so when dividing 1163 by all prime numbers less than 34, i.e., $2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31$, none of them divide 1163 evenly. Therefore, it can be concluded that 1163 is a prime number.