312222222212 has 48 divisors (see below), whose sum is σ = 559856344320. Its totient is φ = 152314905600.

The previous prime is 312222222211. The next prime is 312222222229. The reversal of 312222222212 is 212222222213.

It is not an unprimeable number, because it can be changed into a prime (312222222211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21173162 + ... + 21187902.

It is an arithmetic number, because the mean of its divisors is an integer number (11663673840).

Almost surely, 2^312222222212 is an apocalyptic number.

It is an amenable number.

312222222212 is a deficient number, since it is larger than the sum of its proper divisors (247634122108).

312222222212 is a wasteful number, since it uses less digits than its factorization.

312222222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15612 (or 15610 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

Adding to 312222222212 its reverse (212222222213), we get a palindrome (524444444425).

Subtracting from 312222222212 its reverse (212222222213), we obtain a palindrome (99999999999).

The spelling of 312222222212 in words is "three hundred twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twelve".