231032321123 has 4 divisors (see below), whose sum is σ = 231048070488. Its totient is φ = 231016571760.

The previous prime is 231032321099. The next prime is 231032321137. The reversal of 231032321123 is 321123230132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231032321123 - 2²⁰ = 231031272547 is a prime.

It is a super-2 number, since 2×231032321123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231032324123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7852658 + ... + 7882023.

It is an arithmetic number, because the mean of its divisors is an integer number (57762017622).

Almost surely, 2^231032321123 is an apocalyptic number.

231032321123 is a deficient number, since it is larger than the sum of its proper divisors (15749365).

231032321123 is a wasteful number, since it uses less digits than its factorization.

231032321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15749364.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 231032321123 its reverse (321123230132), we get a palindrome (552155551255).

Subtracting 231032321123 from its reverse (321123230132), we obtain a palindrome (90090909009).

The spelling of 231032321123 in words is "two hundred thirty-one billion, thirty-two million, three hundred twenty-one thousand, one hundred twenty-three".