212031331000021 has 32 divisors (see below), whose sum is σ = 234444069483008. Its totient is φ = 190521435787200.

The previous prime is 212031331000003. The next prime is 212031331000057. The reversal of 212031331000021 is 120000133130212.

212031331000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212031331000021 - 2³⁵ = 211996971261653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212031331009021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1350000946 + ... + 1350157996.

It is an arithmetic number, because the mean of its divisors is an integer number (7326377171344).

Almost surely, 2^{212031331000021} is an apocalyptic number.

It is an amenable number.

212031331000021 is a deficient number, since it is larger than the sum of its proper divisors (22412738482987).

212031331000021 is a wasteful number, since it uses less digits than its factorization.

212031331000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165281.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 212031331000021 its reverse (120000133130212), we get a palindrome (332031464130233).

The spelling of 212031331000021 in words is "two hundred twelve trillion, thirty-one billion, three hundred thirty-one million, twenty-one", and thus it is an aban number.