21226330663 has 2 divisors, whose sum is σ = 21226330664. Its totient is φ = 21226330662.

The previous prime is 21226330603. The next prime is 21226330691. The reversal of 21226330663 is 36603362212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21226330663 - 2²⁹ = 20689459751 is a prime.

It is a super-2 number, since 2×21226330663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21226330603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10613165331 + 10613165332.

It is an arithmetic number, because the mean of its divisors is an integer number (10613165332).

Almost surely, 2^21226330663 is an apocalyptic number.

21226330663 is a deficient number, since it is larger than the sum of its proper divisors (1).

21226330663 is an equidigital number, since it uses as much as digits as its factorization.

21226330663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 34.

Adding to 21226330663 its reverse (36603362212), we get a palindrome (57829692875).

The spelling of 21226330663 in words is "twenty-one billion, two hundred twenty-six million, three hundred thirty thousand, six hundred sixty-three".