21222364056563 has 2 divisors, whose sum is σ = 21222364056564. Its totient is φ = 21222364056562.

The previous prime is 21222364056559. The next prime is 21222364056601. The reversal of 21222364056563 is 36565046322212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222364056563 - 2² = 21222364056559 is a prime.

It is a super-2 number, since 2×21222364056563² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21222364056503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611182028281 + 10611182028282.

It is an arithmetic number, because the mean of its divisors is an integer number (10611182028282).

Almost surely, 2^{21222364056563} is an apocalyptic number.

21222364056563 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222364056563 is an equidigital number, since it uses as much as digits as its factorization.

21222364056563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 21222364056563 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred sixty-four million, fifty-six thousand, five hundred sixty-three".