31021033312212 has 24 divisors (see below), whose sum is σ = 72382550800896. Its totient is φ = 10340324474688.

The previous prime is 31021033312211. The next prime is 31021033312261. The reversal of 31021033312212 is 21221333012013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021033312211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4842573 + ... + 9246219.

It is an arithmetic number, because the mean of its divisors is an integer number (3015939616704).

Almost surely, 2^{31021033312212} is an apocalyptic number.

It is an amenable number.

31021033312212 is an abundant number, since it is smaller than the sum of its proper divisors (41361517488684).

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

31021033312212 is a wasteful number, since it uses less digits than its factorization.

31021033312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990687 (or 4990685 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31021033312212 its reverse (21221333012013), we get a palindrome (52242366324225).

The spelling of 31021033312212 in words is "thirty-one trillion, twenty-one billion, thirty-three million, three hundred twelve thousand, two hundred twelve".