123123203231 has 8 divisors (see below), whose sum is σ = 140714647584. Its totient is φ = 105532362720.

The previous prime is 123123203219. The next prime is 123123203249. The reversal of 123123203231 is 132302321321.

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

It is a cyclic number.

It is not a de Polignac number, because 123123203231 - 2²⁶ = 123056094367 is a prime.

It is a super-2 number, since 2×123123203231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123123203197 and 123123203206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123123203251) 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, 440441 + ... + 663501.

It is an arithmetic number, because the mean of its divisors is an integer number (17589330948).

Almost surely, 2^123123203231 is an apocalyptic number.

123123203231 is a deficient number, since it is larger than the sum of its proper divisors (17591444353).

123123203231 is an equidigital number, since it uses as much as digits as its factorization.

123123203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301921.

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

Adding to 123123203231 its reverse (132302321321), we get a palindrome (255425524552).

The spelling of 123123203231 in words is "one hundred twenty-three billion, one hundred twenty-three million, two hundred three thousand, two hundred thirty-one".