123212031 has 16 divisors (see below), whose sum is σ = 165784320. Its totient is φ = 81394880.

The previous prime is 123212027. The next prime is 123212041. The reversal of 123212031 is 130212321.

It is a cyclic number.

It is not a de Polignac number, because 123212031 - 2² = 123212027 is a prime.

It is a super-2 number, since 2×123212031² = 30362409166289922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123212031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250696 + ... + 251186.

It is an arithmetic number, because the mean of its divisors is an integer number (10361520).

Almost surely, 2^123212031 is an apocalyptic number.

123212031 is a deficient number, since it is larger than the sum of its proper divisors (42572289).

123212031 is a wasteful number, since it uses less digits than its factorization.

123212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123212031 is about 11100.0914861095. The cubic root of 123212031 is about 497.6045836207.

Adding to 123212031 its reverse (130212321), we get a palindrome (253424352).

The spelling of 123212031 in words is "one hundred twenty-three million, two hundred twelve thousand, thirty-one".