312220022212 has 72 divisors (see below), whose sum is σ = 683278243200. Its totient is φ = 124068805056.

The previous prime is 312220022183. The next prime is 312220022243. The reversal of 312220022212 is 212220022213.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 312220022212.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 716887 + ... + 1066942.

It is an arithmetic number, because the mean of its divisors is an integer number (9489975600).

Almost surely, 2^312220022212 is an apocalyptic number.

It is an amenable number.

312220022212 is an abundant number, since it is smaller than the sum of its proper divisors (371058220988).

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

312220022212 is a wasteful number, since it uses less digits than its factorization.

312220022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783913 (or 1783904 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 312220022212 its reverse (212220022213), we get a palindrome (524440044425).

Subtracting from 312220022212 its reverse (212220022213), we obtain a palindrome (99999999999).

The spelling of 312220022212 in words is "three hundred twelve billion, two hundred twenty million, twenty-two thousand, two hundred twelve".