21210322200016 has 20 divisors (see below), whose sum is σ = 42420644401024. Its totient is φ = 10263059128800.

The previous prime is 21210322200013. The next prime is 21210322200017. The reversal of 21210322200016 is 61000222301212.

It is a happy number.

21210322200016 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21210322200016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210322200013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21381372690 + ... + 21381373681.

Almost surely, 2^{21210322200016} is an apocalyptic number.

It is an amenable number.

21210322200016 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21210322200016 is a wasteful number, since it uses less digits than its factorization.

21210322200016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42762746410 (or 42762746404 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21210322200016 its reverse (61000222301212), we get a palindrome (82210544501228).

The spelling of 21210322200016 in words is "twenty-one trillion, two hundred ten billion, three hundred twenty-two million, two hundred thousand, sixteen".