123431302213121 has 16 divisors (see below), whose sum is σ = 142247231013888. Its totient is φ = 104913548946000.

The previous prime is 123431302213091. The next prime is 123431302213151. The reversal of 123431302213121 is 121312203134321.

It is an interprime number because it is at equal distance from previous prime (123431302213091) and next prime (123431302213151).

It is a cyclic number.

It is not a de Polignac number, because 123431302213121 - 2²⁶ = 123431235104257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123431302213151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101651375 + ... + 102858468.

It is an arithmetic number, because the mean of its divisors is an integer number (8890451938368).

Almost surely, 2^{123431302213121} is an apocalyptic number.

It is an amenable number.

123431302213121 is a deficient number, since it is larger than the sum of its proper divisors (18815928800767).

123431302213121 is a wasteful number, since it uses less digits than its factorization.

123431302213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204510572.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 123431302213121 its reverse (121312203134321), we get a palindrome (244743505347442).

The spelling of 123431302213121 in words is "one hundred twenty-three trillion, four hundred thirty-one billion, three hundred two million, two hundred thirteen thousand, one hundred twenty-one".