21102027599 has 2 divisors, whose sum is σ = 21102027600. Its totient is φ = 21102027598.

The previous prime is 21102027593. The next prime is 21102027607. The reversal of 21102027599 is 99572020112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21102027599 - 2⁸ = 21102027343 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102027593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551013799 + 10551013800.

It is an arithmetic number, because the mean of its divisors is an integer number (10551013800).

Almost surely, 2^21102027599 is an apocalyptic number.

21102027599 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102027599 is an equidigital number, since it uses as much as digits as its factorization.

21102027599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 21102027599 in words is "twenty-one billion, one hundred two million, twenty-seven thousand, five hundred ninety-nine".