123012313520503 has 16 divisors (see below), whose sum is σ = 137318432841216. Its totient is φ = 109226813955840.

The previous prime is 123012313520479. The next prime is 123012313520519. The reversal of 123012313520503 is 305025313210321.

It is a cyclic number.

It is not a de Polignac number, because 123012313520503 - 2²⁵ = 123012279966071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123012313520003) 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, 25658626 + ... + 30073072.

It is an arithmetic number, because the mean of its divisors is an integer number (8582402052576).

Almost surely, 2^{123012313520503} is an apocalyptic number.

123012313520503 is a deficient number, since it is larger than the sum of its proper divisors (14306119320713).

123012313520503 is a wasteful number, since it uses less digits than its factorization.

123012313520503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473414.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 123012313520503 its reverse (305025313210321), we get a palindrome (428037626730824).

The spelling of 123012313520503 in words is "one hundred twenty-three trillion, twelve billion, three hundred thirteen million, five hundred twenty thousand, five hundred three".