22022125621 has 2 divisors, whose sum is σ = 22022125622. Its totient is φ = 22022125620.

The previous prime is 22022125607. The next prime is 22022125637. The reversal of 22022125621 is 12652122022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18816980625 + 3205144996 = 137175^2 + 56614^2 .

It is a cyclic number.

It is not a de Polignac number, because 22022125621 - 2¹⁵ = 22022092853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22022125121) 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 as a sum of consecutive naturals, namely, 11011062810 + 11011062811.

It is an arithmetic number, because the mean of its divisors is an integer number (11011062811).

Almost surely, 2^22022125621 is an apocalyptic number.

It is an amenable number.

22022125621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22022125621 is an equidigital number, since it uses as much as digits as its factorization.

22022125621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 22022125621 its reverse (12652122022), we get a palindrome (34674247643).

The spelling of 22022125621 in words is "twenty-two billion, twenty-two million, one hundred twenty-five thousand, six hundred twenty-one".