123311312 has 20 divisors (see below), whose sum is σ = 239096676. Its totient is φ = 61608960.

The previous prime is 123311299. The next prime is 123311323. The reversal of 123311312 is 213113321.

It can be written as a sum of positive squares in 2 ways, for example, as 107661376 + 15649936 = 10376^2 + 3956^2 .

It is a super-2 number, since 2×123311312² = 30411359334322688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30362 + ... + 34182.

Almost surely, 2^123311312 is an apocalyptic number.

It is an amenable number.

123311312 is a deficient number, since it is larger than the sum of its proper divisors (115785364).

123311312 is a wasteful number, since it uses less digits than its factorization.

123311312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5846 (or 5840 counting only the distinct ones).

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

The square root of 123311312 is about 11104.5626658595. The cubic root of 123311312 is about 497.7381999488.

Adding to 123311312 its reverse (213113321), we get a palindrome (336424633).

The spelling of 123311312 in words is "one hundred twenty-three million, three hundred eleven thousand, three hundred twelve".