22200000221 has 12 divisors (see below), whose sum is σ = 26714991420. Its totient is φ = 18372412800.

The previous prime is 22200000191. The next prime is 22200000233. The reversal of 22200000221 is 12200000222.

It can be written as a sum of positive squares in 2 ways, for example, as 8030668996 + 14169331225 = 89614^2 + 119035^2 .

It is not a de Polignac number, because 22200000221 - 2¹⁴ = 22199983837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200002221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7809980 + ... + 7812821.

It is an arithmetic number, because the mean of its divisors is an integer number (2226249285).

Almost surely, 2^22200000221 is an apocalyptic number.

It is an amenable number.

22200000221 is a deficient number, since it is larger than the sum of its proper divisors (4514991199).

22200000221 is a wasteful number, since it uses less digits than its factorization.

22200000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15622844 (or 15622837 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 22200000221 its reverse (12200000222), we get a palindrome (34400000443).

Subtracting from 22200000221 its reverse (12200000222), we obtain a palindrome (9999999999).

The spelling of 22200000221 in words is "twenty-two billion, two hundred million, two hundred twenty-one", and thus it is an aban number.