22244244221 has 4 divisors (see below), whose sum is σ = 22414047744. Its totient is φ = 22074440700.

The previous prime is 22244244203. The next prime is 22244244223. The reversal of 22244244221 is 12244244222.

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 22244244221 - 2⁶ = 22244244157 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 (22244244223) 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, 84901565 + ... + 84901826.

It is an arithmetic number, because the mean of its divisors is an integer number (5603511936).

Almost surely, 2^22244244221 is an apocalyptic number.

It is an amenable number.

22244244221 is a deficient number, since it is larger than the sum of its proper divisors (169803523).

22244244221 is a wasteful number, since it uses less digits than its factorization.

22244244221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169803522.

The product of its digits is 16384, while the sum is 29.

Adding to 22244244221 its reverse (12244244222), we get a palindrome (34488488443).

Subtracting from 22244244221 its reverse (12244244222), we obtain a palindrome (9999999999).

The spelling of 22244244221 in words is "twenty-two billion, two hundred forty-four million, two hundred forty-four thousand, two hundred twenty-one".