21103313099 has 16 divisors (see below), whose sum is σ = 23270927616. Its totient is φ = 18978304800.

The previous prime is 21103313087. The next prime is 21103313111. The reversal of 21103313099 is 99031330112.

It is an interprime number because it is at equal distance from previous prime (21103313087) and next prime (21103313111).

It is a cyclic number.

It is not a de Polignac number, because 21103313099 - 2²⁰ = 21102264523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103313009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365114 + ... + 418944.

It is an arithmetic number, because the mean of its divisors is an integer number (1454432976).

Almost surely, 2^21103313099 is an apocalyptic number.

21103313099 is a deficient number, since it is larger than the sum of its proper divisors (2167614517).

21103313099 is a wasteful number, since it uses less digits than its factorization.

21103313099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54226.

The product of its (nonzero) digits is 4374, while the sum is 32.

The spelling of 21103313099 in words is "twenty-one billion, one hundred three million, three hundred thirteen thousand, ninety-nine".