123031013133131 has 4 divisors (see below), whose sum is σ = 123031042494912. Its totient is φ = 123030983771352.

The previous prime is 123031013133079. The next prime is 123031013133137. The reversal of 123031013133131 is 131331310130321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123031013133131 is a prime.

It is a super-2 number, since 2×123031013133131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123031013133131.

It is not an unprimeable number, because it can be changed into a prime (123031013133137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7085900 + ... + 17212553.

It is an arithmetic number, because the mean of its divisors is an integer number (30757760623728).

Almost surely, 2^{123031013133131} is an apocalyptic number.

123031013133131 is a deficient number, since it is larger than the sum of its proper divisors (29361781).

123031013133131 is an equidigital number, since it uses as much as digits as its factorization.

123031013133131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29361780.

The product of its (nonzero) digits is 1458, while the sum is 26.

Adding to 123031013133131 its reverse (131331310130321), we get a palindrome (254362323263452).

The spelling of 123031013133131 in words is "one hundred twenty-three trillion, thirty-one billion, thirteen million, one hundred thirty-three thousand, one hundred thirty-one".