22236263221 has 4 divisors (see below), whose sum is σ = 22268443744. Its totient is φ = 22204082700.

The previous prime is 22236263183. The next prime is 22236263251. The reversal of 22236263221 is 12236263222.

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 a cyclic number.

It is not a de Polignac number, because 22236263221 - 2³³ = 13646328629 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 (22236263251) 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, 16089225 + ... + 16090606.

It is an arithmetic number, because the mean of its divisors is an integer number (5567110936).

Almost surely, 2^22236263221 is an apocalyptic number.

It is an amenable number.

22236263221 is a deficient number, since it is larger than the sum of its proper divisors (32180523).

22236263221 is an equidigital number, since it uses as much as digits as its factorization.

22236263221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32180522.

The product of its digits is 20736, while the sum is 31.

Subtracting from 22236263221 its reverse (12236263222), we obtain a palindrome (9999999999).

The spelling of 22236263221 in words is "twenty-two billion, two hundred thirty-six million, two hundred sixty-three thousand, two hundred twenty-one".