21633212611 has 2 divisors, whose sum is σ = 21633212612. Its totient is φ = 21633212610.

The previous prime is 21633212551. The next prime is 21633212617. The reversal of 21633212611 is 11621233612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21633212611 - 2¹¹ = 21633210563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21633212611.

It is not a weakly prime, because it can be changed into another prime (21633212617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10816606305 + 10816606306.

It is an arithmetic number, because the mean of its divisors is an integer number (10816606306).

Almost surely, 2^21633212611 is an apocalyptic number.

21633212611 is a deficient number, since it is larger than the sum of its proper divisors (1).

21633212611 is an equidigital number, since it uses as much as digits as its factorization.

21633212611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The spelling of 21633212611 in words is "twenty-one billion, six hundred thirty-three million, two hundred twelve thousand, six hundred eleven".