312123112 has 32 divisors (see below), whose sum is σ = 669409920. Its totient is φ = 133652160.

The previous prime is 312123109. The next prime is 312123137. The reversal of 312123112 is 211321213.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110437 + ... + 113227.

It is an arithmetic number, because the mean of its divisors is an integer number (20919060).

Almost surely, 2^312123112 is an apocalyptic number.

It is an amenable number.

312123112 is an abundant number, since it is smaller than the sum of its proper divisors (357286808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312123112 is a wasteful number, since it uses less digits than its factorization.

312123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801 (or 4797 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 312123112 is about 17667.0063112005. The cubic root of 312123112 is about 678.3314860220.

Adding to 312123112 its reverse (211321213), we get a palindrome (523444325).

The spelling of 312123112 in words is "three hundred twelve million, one hundred twenty-three thousand, one hundred twelve".