123320520234491 has 4 divisors (see below), whose sum is σ = 125944361090592. Its totient is φ = 120696679378392.

The previous prime is 123320520234463. The next prime is 123320520234523. The reversal of 123320520234491 is 194432025023321.

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

It is a cyclic number.

It is not a de Polignac number, because 123320520234491 - 2¹⁴ = 123320520218107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123329520234491) 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, 1311920427980 + ... + 1311920428073.

It is an arithmetic number, because the mean of its divisors is an integer number (31486090272648).

Almost surely, 2^{123320520234491} is an apocalyptic number.

123320520234491 is a deficient number, since it is larger than the sum of its proper divisors (2623840856101).

123320520234491 is an equidigital number, since it uses as much as digits as its factorization.

123320520234491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623840856100.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 123320520234491 in words is "one hundred twenty-three trillion, three hundred twenty billion, five hundred twenty million, two hundred thirty-four thousand, four hundred ninety-one".