22366571221 has 12 divisors (see below), whose sum is σ = 23870983500. Its totient is φ = 20951270208.

The previous prime is 22366571189. The next prime is 22366571239. The reversal of 22366571221 is 12217566322.

It can be written as a sum of positive squares in 2 ways, for example, as 4728075121 + 17638496100 = 68761^2 + 132810^2 .

It is not a de Polignac number, because 22366571221 - 2⁵ = 22366571189 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 (22366571261) 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, 315946 + ... + 380203.

It is an arithmetic number, because the mean of its divisors is an integer number (1989248625).

Almost surely, 2^22366571221 is an apocalyptic number.

It is an amenable number.

22366571221 is a deficient number, since it is larger than the sum of its proper divisors (1504412279).

22366571221 is an equidigital number, since it uses as much as digits as its factorization.

22366571221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696276 (or 696257 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The spelling of 22366571221 in words is "twenty-two billion, three hundred sixty-six million, five hundred seventy-one thousand, two hundred twenty-one".