312111113212 has 48 divisors (see below), whose sum is σ = 563610700800. Its totient is φ = 151159776320.

The previous prime is 312111113179. The next prime is 312111113227. The reversal of 312111113212 is 212311111213.

It is a self number, because there is not a number n which added to its sum of digits gives 312111113212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34563114 + ... + 34572142.

It is an arithmetic number, because the mean of its divisors is an integer number (11741889600).

Almost surely, 2^312111113212 is an apocalyptic number.

It is an amenable number.

312111113212 is a deficient number, since it is larger than the sum of its proper divisors (251499587588).

312111113212 is a wasteful number, since it uses less digits than its factorization.

312111113212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11226 (or 11224 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

Adding to 312111113212 its reverse (212311111213), we get a palindrome (524422224425).

The spelling of 312111113212 in words is "three hundred twelve billion, one hundred eleven million, one hundred thirteen thousand, two hundred twelve".