22121616563 has 2 divisors, whose sum is σ = 22121616564. Its totient is φ = 22121616562.

The previous prime is 22121616541. The next prime is 22121616589. The reversal of 22121616563 is 36561612122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121616563 - 2¹⁰ = 22121615539 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121616593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060808281 + 11060808282.

It is an arithmetic number, because the mean of its divisors is an integer number (11060808282).

Almost surely, 2^22121616563 is an apocalyptic number.

22121616563 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121616563 is an equidigital number, since it uses as much as digits as its factorization.

22121616563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The spelling of 22121616563 in words is "twenty-two billion, one hundred twenty-one million, six hundred sixteen thousand, five hundred sixty-three".