123031123223021 has 8 divisors (see below), whose sum is σ = 134361183325824. Its totient is φ = 111967652769840.

The previous prime is 123031123222951. The next prime is 123031123223039. The reversal of 123031123223021 is 120322321130321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123031123223021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031123223321) 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, 66647411441 + ... + 66647413286.

It is an arithmetic number, because the mean of its divisors is an integer number (16795147915728).

Almost surely, 2^{123031123223021} is an apocalyptic number.

It is an amenable number.

123031123223021 is a deficient number, since it is larger than the sum of its proper divisors (11330060102803).

123031123223021 is a wasteful number, since it uses less digits than its factorization.

123031123223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133294824811.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 123031123223021 its reverse (120322321130321), we get a palindrome (243353444353342).

The spelling of 123031123223021 in words is "one hundred twenty-three trillion, thirty-one billion, one hundred twenty-three million, two hundred twenty-three thousand, twenty-one".