123230331021 has 16 divisors (see below), whose sum is σ = 190857907328. Its totient is φ = 69262948800.

The previous prime is 123230330999. The next prime is 123230331023. The reversal of 123230331021 is 120133032321.

It is not a de Polignac number, because 123230331021 - 2¹⁵ = 123230298253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123230331023) 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, 48097990 + ... + 48100551.

It is an arithmetic number, because the mean of its divisors is an integer number (11928619208).

Almost surely, 2^123230331021 is an apocalyptic number.

It is an amenable number.

123230331021 is a deficient number, since it is larger than the sum of its proper divisors (67627576307).

123230331021 is an equidigital number, since it uses as much as digits as its factorization.

123230331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96198612.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 123230331021 its reverse (120133032321), we get a palindrome (243363363342).

The spelling of 123230331021 in words is "one hundred twenty-three billion, two hundred thirty million, three hundred thirty-one thousand, twenty-one".