22144243021 has 2 divisors, whose sum is σ = 22144243022. Its totient is φ = 22144243020.

The previous prime is 22144242983. The next prime is 22144243057. The reversal of 22144243021 is 12034244122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11709620521 + 10434622500 = 108211^2 + 102150^2 .

It is a cyclic number.

It is not a de Polignac number, because 22144243021 - 2¹³ = 22144234829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22144243421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11072121510 + 11072121511.

It is an arithmetic number, because the mean of its divisors is an integer number (11072121511).

Almost surely, 2^22144243021 is an apocalyptic number.

It is an amenable number.

22144243021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22144243021 is an equidigital number, since it uses as much as digits as its factorization.

22144243021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 22144243021 its reverse (12034244122), we get a palindrome (34178487143).

The spelling of 22144243021 in words is "twenty-two billion, one hundred forty-four million, two hundred forty-three thousand, twenty-one".