123112331 has 2 divisors, whose sum is σ = 123112332. Its totient is φ = 123112330.

The previous prime is 123112321. The next prime is 123112349. The reversal of 123112331 is 133211321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123112331 - 2¹⁸ = 122850187 is a prime.

It is a super-2 number, since 2×123112331² = 30313292088507122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123112321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61556165 + 61556166.

It is an arithmetic number, because the mean of its divisors is an integer number (61556166).

Almost surely, 2^123112331 is an apocalyptic number.

123112331 is a deficient number, since it is larger than the sum of its proper divisors (1).

123112331 is an equidigital number, since it uses as much as digits as its factorization.

123112331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 17.

The square root of 123112331 is about 11095.5996232741. The cubic root of 123112331 is about 497.4703311348.

Adding to 123112331 its reverse (133211321), we get a palindrome (256323652).

The spelling of 123112331 in words is "one hundred twenty-three million, one hundred twelve thousand, three hundred thirty-one".