22002200021221 has 32 divisors (see below), whose sum is σ = 27279303897600. Its totient is φ = 17698710661632.

The previous prime is 22002200021209. The next prime is 22002200021233. The reversal of 22002200021221 is 12212000220022.

It is an interprime number because it is at equal distance from previous prime (22002200021209) and next prime (22002200021233).

It is not a de Polignac number, because 22002200021221 - 2⁹ = 22002200020709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22002200021195 and 22002200021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002200021201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25892940 + ... + 26729173.

It is an arithmetic number, because the mean of its divisors is an integer number (852478246800).

Almost surely, 2^{22002200021221} is an apocalyptic number.

It is an amenable number.

22002200021221 is a deficient number, since it is larger than the sum of its proper divisors (5277103876379).

22002200021221 is an equidigital number, since it uses as much as digits as its factorization.

22002200021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52622210 (or 52622196 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22002200021221 its reverse (12212000220022), we get a palindrome (34214200241243).

The spelling of 22002200021221 in words is "twenty-two trillion, two billion, two hundred million, twenty-one thousand, two hundred twenty-one".