31213313112213 has 12 divisors (see below), whose sum is σ = 45108139416288. Its totient is φ = 20798609547240.

The previous prime is 31213313112209. The next prime is 31213313112217. The reversal of 31213313112213 is 31221131331213.

31213313112213 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 331 + 3 + 112 + 213 = 666.

It is an interprime number because it is at equal distance from previous prime (31213313112209) and next prime (31213313112217).

It is not a de Polignac number, because 31213313112213 - 2² = 31213313112209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213313112217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 855469153 + ... + 855505638.

It is an arithmetic number, because the mean of its divisors is an integer number (3759011618024).

Almost surely, 2^{31213313112213} is an apocalyptic number.

It is an amenable number.

31213313112213 is a deficient number, since it is larger than the sum of its proper divisors (13894826304075).

31213313112213 is a wasteful number, since it uses less digits than its factorization.

31213313112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710976824 (or 1710976821 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

Adding to 31213313112213 its reverse (31221131331213), we get a palindrome (62434444443426).

The spelling of 31213313112213 in words is "thirty-one trillion, two hundred thirteen billion, three hundred thirteen million, one hundred twelve thousand, two hundred thirteen".