123113131312123 has 16 divisors (see below), whose sum is σ = 127586836329120. Its totient is φ = 118741214186496.

The previous prime is 123113131312099. The next prime is 123113131312133. The reversal of 123113131312123 is 321213131311321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123113131312123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123113131312091 and 123113131312100.

It is not an unprimeable number, because it can be changed into a prime (123113131312133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91196218 + ... + 92536351.

It is an arithmetic number, because the mean of its divisors is an integer number (7974177270570).

Almost surely, 2^{123113131312123} is an apocalyptic number.

123113131312123 is a deficient number, since it is larger than the sum of its proper divisors (4473705016997).

123113131312123 is a wasteful number, since it uses less digits than its factorization.

123113131312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183732846.

The product of its digits is 1944, while the sum is 28.

Adding to 123113131312123 its reverse (321213131311321), we get a palindrome (444326262623444).

The spelling of 123113131312123 in words is "one hundred twenty-three trillion, one hundred thirteen billion, one hundred thirty-one million, three hundred twelve thousand, one hundred twenty-three".