31212020310012 has 36 divisors (see below), whose sum is σ = 78926392250160. Its totient is φ = 10400137638912.

The previous prime is 31212020309993. The next prime is 31212020310047. The reversal of 31212020310012 is 21001302021213.

31212020310012 is a `hidden beast` number, since 312 + 1 + 20 + 20 + 310 + 0 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161115648 + ... + 161309255.

Almost surely, 2^{31212020310012} is an apocalyptic number.

It is an amenable number.

31212020310012 is an abundant number, since it is smaller than the sum of its proper divisors (47714371940148).

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

31212020310012 is a wasteful number, since it uses less digits than its factorization.

31212020310012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322427602 (or 322427597 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31212020310012 its reverse (21001302021213), we get a palindrome (52213322331225).

The spelling of 31212020310012 in words is "thirty-one trillion, two hundred twelve billion, twenty million, three hundred ten thousand, twelve".