21210321013312 has 28 divisors (see below), whose sum is σ = 43919197318656. Its totient is φ = 10144066570880.

The previous prime is 21210321013237. The next prime is 21210321013379. The reversal of 21210321013312 is 21331012301212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7204591264 + ... + 7204594207.

Almost surely, 2^{21210321013312} is an apocalyptic number.

It is an amenable number.

21210321013312 is an abundant number, since it is smaller than the sum of its proper divisors (22708876305344).

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

21210321013312 is a wasteful number, since it uses less digits than its factorization.

21210321013312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14409185506 (or 14409185496 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21210321013312 its reverse (21331012301212), we get a palindrome (42541333314524).

The spelling of 21210321013312 in words is "twenty-one trillion, two hundred ten billion, three hundred twenty-one million, thirteen thousand, three hundred twelve".