212021031312 has 60 divisors (see below), whose sum is σ = 624594128080. Its totient is φ = 66954009024.

The previous prime is 212021031241. The next prime is 212021031359. The reversal of 212021031312 is 213130120212.

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

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, 38743798 + ... + 38749269.

Almost surely, 2^212021031312 is an apocalyptic number.

It is an amenable number.

212021031312 is an abundant number, since it is smaller than the sum of its proper divisors (412573096768).

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

212021031312 is a wasteful number, since it uses less digits than its factorization.

212021031312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77493100 (or 77493091 counting only the distinct ones).

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

Adding to 212021031312 its reverse (213130120212), we get a palindrome (425151151524).

The spelling of 212021031312 in words is "two hundred twelve billion, twenty-one million, thirty-one thousand, three hundred twelve".