21200321313012 has 12 divisors (see below), whose sum is σ = 49467416397056. Its totient is φ = 7066773771000.

The previous prime is 21200321312999. The next prime is 21200321313037. The reversal of 21200321313012 is 21031312300212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 21200321313012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883346721364 + ... + 883346721387.

Almost surely, 2^{21200321313012} is an apocalyptic number.

It is an amenable number.

21200321313012 is an abundant number, since it is smaller than the sum of its proper divisors (28267095084044).

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

21200321313012 is a wasteful number, since it uses less digits than its factorization.

21200321313012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766693442758 (or 1766693442756 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21200321313012 its reverse (21031312300212), we get a palindrome (42231633613224).

The spelling of 21200321313012 in words is "twenty-one trillion, two hundred billion, three hundred twenty-one million, three hundred thirteen thousand, twelve".