22244312021 has 4 divisors (see below), whose sum is σ = 22249252032. Its totient is φ = 22239372012.

The previous prime is 22244312003. The next prime is 22244312063. The reversal of 22244312021 is 12021344222.

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 22244312021 - 2¹⁴ = 22244295637 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 (22244312071) 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, 2463245 + ... + 2472258.

It is an arithmetic number, because the mean of its divisors is an integer number (5562313008).

Almost surely, 2^22244312021 is an apocalyptic number.

It is an amenable number.

22244312021 is a deficient number, since it is larger than the sum of its proper divisors (4940011).

22244312021 is an equidigital number, since it uses as much as digits as its factorization.

22244312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940010.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 22244312021 its reverse (12021344222), we get a palindrome (34265656243).

The spelling of 22244312021 in words is "twenty-two billion, two hundred forty-four million, three hundred twelve thousand, twenty-one".