21216362422063 has 2 divisors, whose sum is σ = 21216362422064. Its totient is φ = 21216362422062.

The previous prime is 21216362422027. The next prime is 21216362422091. The reversal of 21216362422063 is 36022426361212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21216362422063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21216362722063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10608181211031 + 10608181211032.

It is an arithmetic number, because the mean of its divisors is an integer number (10608181211032).

Almost surely, 2^{21216362422063} is an apocalyptic number.

21216362422063 is a deficient number, since it is larger than the sum of its proper divisors (1).

21216362422063 is an equidigital number, since it uses as much as digits as its factorization.

21216362422063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 40.

Adding to 21216362422063 its reverse (36022426361212), we get a palindrome (57238788783275).

The spelling of 21216362422063 in words is "twenty-one trillion, two hundred sixteen billion, three hundred sixty-two million, four hundred twenty-two thousand, sixty-three".