22442112221 has 4 divisors (see below), whose sum is σ = 22442413344. Its totient is φ = 22441811100.

The previous prime is 22442112169. The next prime is 22442112223. The reversal of 22442112221 is 12221124422.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22442112221 - 2²² = 22437917917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22442112223) 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, 52706 + ... + 218316.

It is an arithmetic number, because the mean of its divisors is an integer number (5610603336).

Almost surely, 2^22442112221 is an apocalyptic number.

It is an amenable number.

22442112221 is a deficient number, since it is larger than the sum of its proper divisors (301123).

22442112221 is a wasteful number, since it uses less digits than its factorization.

22442112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301122.

The product of its digits is 1024, while the sum is 23.

Adding to 22442112221 its reverse (12221124422), we get a palindrome (34663236643).

The spelling of 22442112221 in words is "twenty-two billion, four hundred forty-two million, one hundred twelve thousand, two hundred twenty-one".