123255330504521 has 16 divisors (see below), whose sum is σ = 126671198362128. Its totient is φ = 119859007257600.

The previous prime is 123255330504421. The next prime is 123255330504533. The reversal of 123255330504521 is 125405033552321.

It can be written as a sum of positive squares in 8 ways, for example, as 34413018120121 + 88842312384400 = 5866261^2 + 9425620^2 .

It is a cyclic number.

It is not a de Polignac number, because 123255330504521 - 2²⁶ = 123255263395657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (123255330504571) 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, 272102795 + ... + 272555391.

It is an arithmetic number, because the mean of its divisors is an integer number (7916949897633).

Almost surely, 2^{123255330504521} is an apocalyptic number.

It is an amenable number.

123255330504521 is a deficient number, since it is larger than the sum of its proper divisors (3415867857607).

123255330504521 is a wasteful number, since it uses less digits than its factorization.

123255330504521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474172.

The product of its (nonzero) digits is 540000, while the sum is 41.

The spelling of 123255330504521 in words is "one hundred twenty-three trillion, two hundred fifty-five billion, three hundred thirty million, five hundred four thousand, five hundred twenty-one".