312210221112 has 48 divisors (see below), whose sum is σ = 857152505040. Its totient is φ = 102644454528.

The previous prime is 312210221111. The next prime is 312210221137. The reversal of 312210221112 is 211122012213.

312210221112 is a `hidden beast` number, since 312 + 21 + 0 + 221 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312210221111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29695108 + ... + 29705619.

It is an arithmetic number, because the mean of its divisors is an integer number (17857343855).

Almost surely, 2^312210221112 is an apocalyptic number.

It is an amenable number.

312210221112 is an abundant number, since it is smaller than the sum of its proper divisors (544942283928).

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

312210221112 is a wasteful number, since it uses less digits than its factorization.

312210221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59400812 (or 59400805 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 312210221112 its reverse (211122012213), we get a palindrome (523332233325).

The spelling of 312210221112 in words is "three hundred twelve billion, two hundred ten million, two hundred twenty-one thousand, one hundred twelve".