123033111131 has 8 divisors (see below), whose sum is σ = 143478847200. Its totient is φ = 105456952104.

The previous prime is 123033111109. The next prime is 123033111137. The reversal of 123033111131 is 131111330321.

It is a de Polignac number, because none of the positive numbers 2^k-123033111131 is a prime.

It is a super-2 number, since 2×123033111131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123033111137) 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, 179348216 + ... + 179348901.

It is an arithmetic number, because the mean of its divisors is an integer number (17934855900).

Almost surely, 2^123033111131 is an apocalyptic number.

123033111131 is a deficient number, since it is larger than the sum of its proper divisors (20445736069).

123033111131 is an frugal number, since it uses more digits than its factorization.

123033111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358697138 (or 358697124 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 123033111131 its reverse (131111330321), we get a palindrome (254144441452).

The spelling of 123033111131 in words is "one hundred twenty-three billion, thirty-three million, one hundred eleven thousand, one hundred thirty-one".