312131133212 has 12 divisors (see below), whose sum is σ = 549002223000. Its totient is φ = 155273355216.

The previous prime is 312131133199. The next prime is 312131133233. The reversal of 312131133212 is 212331131213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198051962 + ... + 198053537.

It is an arithmetic number, because the mean of its divisors is an integer number (45750185250).

Almost surely, 2^312131133212 is an apocalyptic number.

It is an amenable number.

312131133212 is a deficient number, since it is larger than the sum of its proper divisors (236871089788).

312131133212 is a wasteful number, since it uses less digits than its factorization.

312131133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396105700 (or 396105698 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

Adding to 312131133212 its reverse (212331131213), we get a palindrome (524462264425).

The spelling of 312131133212 in words is "three hundred twelve billion, one hundred thirty-one million, one hundred thirty-three thousand, two hundred twelve".