21002022200012 has 24 divisors (see below), whose sum is σ = 42178335054240. Its totient is φ = 8963518659840.

The previous prime is 21002022200011. The next prime is 21002022200017. The reversal of 21002022200012 is 21000222020012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a self number, because there is not a number n which added to its sum of digits gives 21002022200012.

It is not an unprimeable number, because it can be changed into a prime (21002022200011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556159687 + ... + 1556173182.

It is an arithmetic number, because the mean of its divisors is an integer number (1757430627260).

Almost surely, 2^{21002022200012} is an apocalyptic number.

It is an amenable number.

21002022200012 is an abundant number, since it is smaller than the sum of its proper divisors (21176312854228).

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

21002022200012 is a wasteful number, since it uses less digits than its factorization.

21002022200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112333121 (or 3112333119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21002022200012 its reverse (21000222020012), we get a palindrome (42002244220024).

The spelling of 21002022200012 in words is "twenty-one trillion, two billion, twenty-two million, two hundred thousand, twelve".