123131330210321 has 4 divisors (see below), whose sum is σ = 129611926537200. Its totient is φ = 116650733883444.

The previous prime is 123131330210297. The next prime is 123131330210327. The reversal of 123131330210321 is 123012033131321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123131330210321 - 2¹⁸ = 123131329948177 is a prime.

It is a super-2 number, since 2×123131330210321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123131330210327) 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, 3240298163411 + ... + 3240298163448.

It is an arithmetic number, because the mean of its divisors is an integer number (32402981634300).

Almost surely, 2^{123131330210321} is an apocalyptic number.

It is an amenable number.

123131330210321 is a deficient number, since it is larger than the sum of its proper divisors (6480596326879).

123131330210321 is an equidigital number, since it uses as much as digits as its factorization.

123131330210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480596326878.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 123131330210321 its reverse (123012033131321), we get a palindrome (246143363341642).

The spelling of 123131330210321 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, three hundred thirty million, two hundred ten thousand, three hundred twenty-one".