123120320102031 has 12 divisors (see below), whose sum is σ = 190962129138072. Its totient is φ = 70354468629648.

The previous prime is 123120320102009. The next prime is 123120320102071. The reversal of 123120320102031 is 130201023021321.

It is not a de Polignac number, because 123120320102031 - 2⁶ = 123120320101967 is a prime.

It is a super-2 number, since 2×123120320102031² (a number of 29 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 123120320101989 and 123120320102007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123120320102071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418776598840 + ... + 418776599133.

It is an arithmetic number, because the mean of its divisors is an integer number (15913510761506).

Almost surely, 2^{123120320102031} is an apocalyptic number.

123120320102031 is a deficient number, since it is larger than the sum of its proper divisors (67841809036041).

123120320102031 is an equidigital number, since it uses as much as digits as its factorization.

123120320102031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837553197990 (or 837553197983 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123120320102031 its reverse (130201023021321), we get a palindrome (253321343123352).

The spelling of 123120320102031 in words is "one hundred twenty-three trillion, one hundred twenty billion, three hundred twenty million, one hundred two thousand, thirty-one".