31320313132212 has 72 divisors (see below), whose sum is σ = 85330228150440. Its totient is φ = 9629177898240.

The previous prime is 31320313132177. The next prime is 31320313132231. The reversal of 31320313132212 is 21223131302313.

31320313132212 is a `hidden beast` number, since 3 + 1 + 3 + 2 + 0 + 313 + 132 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 16779788386596 + 14540524745616 = 4096314^2 + 3813204^2 .

It is a super-2 number, since 2×31320313132212² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26651739 + ... + 27802082.

It is an arithmetic number, because the mean of its divisors is an integer number (1185142057645).

Almost surely, 2^{31320313132212} is an apocalyptic number.

It is an amenable number.

31320313132212 is an abundant number, since it is smaller than the sum of its proper divisors (54009915018228).

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

31320313132212 is a wasteful number, since it uses less digits than its factorization.

31320313132212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54455073 (or 54455068 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31320313132212 its reverse (21223131302313), we get a palindrome (52543444434525).

The spelling of 31320313132212 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirteen million, one hundred thirty-two thousand, two hundred twelve".