31213211123312 has 20 divisors (see below), whose sum is σ = 61378217397576. Its totient is φ = 15373671149760.

The previous prime is 31213211123309. The next prime is 31213211123321. The reversal of 31213211123312 is 21332111231213.

It is a super-3 number, since 3×31213211123312³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14558399639 + ... + 14558401782.

Almost surely, 2^{31213211123312} is an apocalyptic number.

It is an amenable number.

31213211123312 is a deficient number, since it is larger than the sum of its proper divisors (30165006274264).

31213211123312 is a wasteful number, since it uses less digits than its factorization.

31213211123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29116801496 (or 29116801490 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

Adding to 31213211123312 its reverse (21332111231213), we get a palindrome (52545322354525).

The spelling of 31213211123312 in words is "thirty-one trillion, two hundred thirteen billion, two hundred eleven million, one hundred twenty-three thousand, three hundred twelve".