312101032212 has 36 divisors (see below), whose sum is σ = 790087435956. Its totient is φ = 103880000640.

The previous prime is 312101032207. The next prime is 312101032247. The reversal of 312101032212 is 212230101213.

312101032212 is a `hidden beast` number, since 312 + 10 + 10 + 322 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 202224693636 + 109876338576 = 449694^2 + 331476^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×312101032212² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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, 6378489 + ... + 6427232.

It is an arithmetic number, because the mean of its divisors is an integer number (21946873221).

Almost surely, 2^312101032212 is an apocalyptic number.

It is an amenable number.

312101032212 is an abundant number, since it is smaller than the sum of its proper divisors (477986403744).

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

312101032212 is a wasteful number, since it uses less digits than its factorization.

312101032212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12806408 (or 12806403 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 312101032212 its reverse (212230101213), we get a palindrome (524331133425).

The spelling of 312101032212 in words is "three hundred twelve billion, one hundred one million, thirty-two thousand, two hundred twelve".