21300100111 has 4 divisors (see below), whose sum is σ = 21306655224. Its totient is φ = 21293545000.

The previous prime is 21300100103. The next prime is 21300100141. The reversal of 21300100111 is 11100100312.

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 21300100111 - 2³ = 21300100103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300100141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3272680 + ... + 3279181.

It is an arithmetic number, because the mean of its divisors is an integer number (5326663806).

Almost surely, 2^21300100111 is an apocalyptic number.

21300100111 is a deficient number, since it is larger than the sum of its proper divisors (6555113).

21300100111 is an equidigital number, since it uses as much as digits as its factorization.

21300100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6555112.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 21300100111 its reverse (11100100312), we get a palindrome (32400200423).

The spelling of 21300100111 in words is "twenty-one billion, three hundred million, one hundred thousand, one hundred eleven".