123031134345155 has 8 divisors (see below), whose sum is σ = 156321911873952. Its totient is φ = 92635207036288.

The previous prime is 123031134345139. The next prime is 123031134345179. The reversal of 123031134345155 is 551543431130321.

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

It is not a de Polignac number, because 123031134345155 - 2⁴ = 123031134345139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723712554887 + ... + 723712555056.

It is an arithmetic number, because the mean of its divisors is an integer number (19540238984244).

Almost surely, 2^{123031134345155} is an apocalyptic number.

123031134345155 is a deficient number, since it is larger than the sum of its proper divisors (33290777528797).

123031134345155 is a wasteful number, since it uses less digits than its factorization.

123031134345155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447425109965.

The product of its (nonzero) digits is 324000, while the sum is 41.

Adding to 123031134345155 its reverse (551543431130321), we get a palindrome (674574565475476).

The spelling of 123031134345155 in words is "one hundred twenty-three trillion, thirty-one billion, one hundred thirty-four million, three hundred forty-five thousand, one hundred fifty-five".