312121112212 has 24 divisors (see below), whose sum is σ = 672260857856. Its totient is φ = 123476483808.

The previous prime is 312121112203. The next prime is 312121112239. The reversal of 312121112212 is 212211121213.

It is a self number, because there is not a number n which added to its sum of digits gives 312121112212.

It is a congruent number.

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, 428737428 + ... + 428738155.

Almost surely, 2^312121112212 is an apocalyptic number.

It is an amenable number.

312121112212 is an abundant number, since it is smaller than the sum of its proper divisors (360139745644).

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

312121112212 is a wasteful number, since it uses less digits than its factorization.

312121112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857475607 (or 857475605 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

Adding to 312121112212 its reverse (212211121213), we get a palindrome (524332233425).

Subtracting from 312121112212 its reverse (212211121213), we obtain a palindrome (99909990999).

The spelling of 312121112212 in words is "three hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twelve".