22105328521 has 2 divisors, whose sum is σ = 22105328522. Its totient is φ = 22105328520.

The previous prime is 22105328519. The next prime is 22105328537. The reversal of 22105328521 is 12582350122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21450531600 + 654796921 = 146460^2 + 25589^2 .

It is a cyclic number.

It is not a de Polignac number, because 22105328521 - 2¹ = 22105328519 is a prime.

Together with 22105328519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22105326521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11052664260 + 11052664261.

It is an arithmetic number, because the mean of its divisors is an integer number (11052664261).

Almost surely, 2^22105328521 is an apocalyptic number.

It is an amenable number.

22105328521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22105328521 is an equidigital number, since it uses as much as digits as its factorization.

22105328521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 22105328521 its reverse (12582350122), we get a palindrome (34687678643).

The spelling of 22105328521 in words is "twenty-two billion, one hundred five million, three hundred twenty-eight thousand, five hundred twenty-one".