123023031210021 has 8 divisors (see below), whose sum is σ = 166277704284160. Its totient is φ = 80891856137952.

The previous prime is 123023031210017. The next prime is 123023031210041. The reversal of 123023031210021 is 120012130320321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123023031210021 - 2² = 123023031210017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123023031210021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123023031210041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280874500261 + ... + 280874500698.

It is an arithmetic number, because the mean of its divisors is an integer number (20784713035520).

Almost surely, 2^{123023031210021} is an apocalyptic number.

It is an amenable number.

123023031210021 is a deficient number, since it is larger than the sum of its proper divisors (43254673074139).

123023031210021 is an equidigital number, since it uses as much as digits as its factorization.

123023031210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561749001035.

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

Adding to 123023031210021 its reverse (120012130320321), we get a palindrome (243035161530342).

The spelling of 123023031210021 in words is "one hundred twenty-three trillion, twenty-three billion, thirty-one million, two hundred ten thousand, twenty-one".