21002200022022 has 64 divisors (see below), whose sum is σ = 42378515712000. Its totient is φ = 6938665303680.

The previous prime is 21002200022017. The next prime is 21002200022047. The reversal of 21002200022022 is 22022000220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002200021992 and 21002200022010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2589343747 + ... + 2589351857.

It is an arithmetic number, because the mean of its divisors is an integer number (662164308000).

Almost surely, 2^{21002200022022} is an apocalyptic number.

21002200022022 is an abundant number, since it is smaller than the sum of its proper divisors (21376315689978).

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

21002200022022 is a wasteful number, since it uses less digits than its factorization.

21002200022022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16421.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 21002200022022 its reverse (22022000220012), we get a palindrome (43024200242034).

The spelling of 21002200022022 in words is "twenty-one trillion, two billion, two hundred million, twenty-two thousand, twenty-two".