312212112222 has 32 divisors (see below), whose sum is σ = 661224384000. Its totient is φ = 97938627968.

The previous prime is 312212112217. The next prime is 312212112301. The reversal of 312212112222 is 222211212213.

It is a nude number because it is divisible by every one of its digits.

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, 848029 + ... + 1159127.

It is an arithmetic number, because the mean of its divisors is an integer number (20663262000).

Almost surely, 2^312212112222 is an apocalyptic number.

312212112222 is an abundant number, since it is smaller than the sum of its proper divisors (349012271778).

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

312212112222 is a wasteful number, since it uses less digits than its factorization.

312212112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320960.

The product of its digits is 384, while the sum is 21.

Adding to 312212112222 its reverse (222211212213), we get a palindrome (534423324435).

Subtracting from 312212112222 its reverse (222211212213), we obtain a palindrome (90000900009).

The spelling of 312212112222 in words is "three hundred twelve billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty-two".