21101100299 has 4 divisors (see below), whose sum is σ = 21136684536. Its totient is φ = 21065516064.

The previous prime is 21101100287. The next prime is 21101100413. The reversal of 21101100299 is 99200110112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21101100299 - 2²⁸ = 20832664843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101100239) 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 in 3 ways as a sum of consecutive naturals, for example, 17791229 + ... + 17792414.

It is an arithmetic number, because the mean of its divisors is an integer number (5284171134).

Almost surely, 2^21101100299 is an apocalyptic number.

21101100299 is a deficient number, since it is larger than the sum of its proper divisors (35584237).

21101100299 is an equidigital number, since it uses as much as digits as its factorization.

21101100299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35584236.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 21101100299 in words is "twenty-one billion, one hundred one million, one hundred thousand, two hundred ninety-nine".