312131322212 has 48 divisors (see below), whose sum is σ = 555431385600. Its totient is φ = 153458511360.

The previous prime is 312131322121. The next prime is 312131322229. The reversal of 312131322212 is 212223131213.

It is a super-2 number, since 2×312131322212² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51258464 + ... + 51264552.

It is an arithmetic number, because the mean of its divisors is an integer number (11571487200).

Almost surely, 2^312131322212 is an apocalyptic number.

It is an amenable number.

312131322212 is a deficient number, since it is larger than the sum of its proper divisors (243300063388).

312131322212 is a wasteful number, since it uses less digits than its factorization.

312131322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956 (or 6954 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 312131322212 its reverse (212223131213), we get a palindrome (524354453425).

The spelling of 312131322212 in words is "three hundred twelve billion, one hundred thirty-one million, three hundred twenty-two thousand, two hundred twelve".