312131233212 has 48 divisors (see below), whose sum is σ = 756394642080. Its totient is φ = 100094303232.

The previous prime is 312131233201. The next prime is 312131233237. The reversal of 312131233212 is 212332131213.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3909913 + ... + 3988944.

It is an arithmetic number, because the mean of its divisors is an integer number (15758221710).

Almost surely, 2^312131233212 is an apocalyptic number.

It is an amenable number.

312131233212 is an abundant number, since it is smaller than the sum of its proper divisors (444263408868).

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

312131233212 is a wasteful number, since it uses less digits than its factorization.

312131233212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7898990 (or 7898988 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 312131233212 its reverse (212332131213), we get a palindrome (524463364425).

The spelling of 312131233212 in words is "three hundred twelve billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred twelve".