112

This number is a composite.

112 = 2⁴ * 7. Note that 7⁴ - 2 is prime. [Luhn]

The only 3-digit number such that its factorial raised to the sum of its digits and increased by one is prime. I.e., 112!^(1+1+2)+1 is prime. [Opao]

112!*211! - 1 is prime. [Firoozbakht]

The smallest multi-digit composite nude number whose the reversal is prime. (A nude number is a number that is divisible by all of its digits). [Loungrides]