21024442099 has 2 divisors, whose sum is σ = 21024442100. Its totient is φ = 21024442098.

The previous prime is 21024441989. The next prime is 21024442123. The reversal of 21024442099 is 99024442012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21024442099 - 2¹¹ = 21024440051 is a prime.

It is not a weakly prime, because it can be changed into another prime (21024442399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10512221049 + 10512221050.

It is an arithmetic number, because the mean of its divisors is an integer number (10512221050).

Almost surely, 2^21024442099 is an apocalyptic number.

21024442099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21024442099 is an equidigital number, since it uses as much as digits as its factorization.

21024442099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 21024442099 in words is "twenty-one billion, twenty-four million, four hundred forty-two thousand, ninety-nine".