22005250221 has 4 divisors (see below), whose sum is σ = 29340333632. Its totient is φ = 14670166812.

The previous prime is 22005250213. The next prime is 22005250231. The reversal of 22005250221 is 12205250022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22005250221 - 2³ = 22005250213 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 (22005250231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3667541701 + ... + 3667541706.

It is an arithmetic number, because the mean of its divisors is an integer number (7335083408).

Almost surely, 2^22005250221 is an apocalyptic number.

It is an amenable number.

22005250221 is a deficient number, since it is larger than the sum of its proper divisors (7335083411).

22005250221 is an equidigital number, since it uses as much as digits as its factorization.

22005250221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335083410.

The product of its (nonzero) digits is 800, while the sum is 21.

The spelling of 22005250221 in words is "twenty-two billion, five million, two hundred fifty thousand, two hundred twenty-one".