123123331212112 has 40 divisors (see below), whose sum is σ = 297414800073792. Its totient is φ = 47970129043200.

The previous prime is 123123331212073. The next prime is 123123331212113. The reversal of 123123331212112 is 211212133321321.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123123331212113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49968883189 + ... + 49968885652.

Almost surely, 2^{123123331212112} is an apocalyptic number.

It is an amenable number.

123123331212112 is an abundant number, since it is smaller than the sum of its proper divisors (174291468861680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123123331212112 is a wasteful number, since it uses less digits than its factorization.

123123331212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99937768867 (or 99937768861 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

Adding to 123123331212112 its reverse (211212133321321), we get a palindrome (334335464533433).

The spelling of 123123331212112 in words is "one hundred twenty-three trillion, one hundred twenty-three billion, three hundred thirty-one million, two hundred twelve thousand, one hundred twelve".