22055012521 has 2 divisors, whose sum is σ = 22055012522. Its totient is φ = 22055012520.

The previous prime is 22055012513. The next prime is 22055012533. The reversal of 22055012521 is 12521055022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14972948496 + 7082064025 = 122364^2 + 84155^2 .

It is a cyclic number.

It is not a de Polignac number, because 22055012521 - 2³ = 22055012513 is a prime.

It is not a weakly prime, because it can be changed into another prime (22055042521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11027506260 + 11027506261.

It is an arithmetic number, because the mean of its divisors is an integer number (11027506261).

Almost surely, 2^22055012521 is an apocalyptic number.

It is an amenable number.

22055012521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22055012521 is an equidigital number, since it uses as much as digits as its factorization.

22055012521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 22055012521 its reverse (12521055022), we get a palindrome (34576067543).

It can be divided in two parts, 2205501 and 2521, that added together give a palindrome (2208022).

The spelling of 22055012521 in words is "twenty-two billion, fifty-five million, twelve thousand, five hundred twenty-one".