22142423221 has 4 divisors (see below), whose sum is σ = 22145347744. Its totient is φ = 22139498700.

The previous prime is 22142423201. The next prime is 22142423267. The reversal of 22142423221 is 12232424122.

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 an emirpimes, since its reverse is a distinct semiprime: 12232424122 = 2 ⋅6116212061.

It is a cyclic number.

It is not a de Polignac number, because 22142423221 - 2¹⁷ = 22142292149 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 (22142423201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450875 + ... + 1466056.

It is an arithmetic number, because the mean of its divisors is an integer number (5536336936).

Almost surely, 2^22142423221 is an apocalyptic number.

It is an amenable number.

22142423221 is a deficient number, since it is larger than the sum of its proper divisors (2924523).

22142423221 is an equidigital number, since it uses as much as digits as its factorization.

22142423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924522.

The product of its digits is 3072, while the sum is 25.

Adding to 22142423221 its reverse (12232424122), we get a palindrome (34374847343).

Subtracting from 22142423221 its reverse (12232424122), we obtain a palindrome (9909999099).

The spelling of 22142423221 in words is "twenty-two billion, one hundred forty-two million, four hundred twenty-three thousand, two hundred twenty-one".