21102001113 has 4 divisors (see below), whose sum is σ = 28136001488. Its totient is φ = 14068000740.

The previous prime is 21102001099. The next prime is 21102001139. The reversal of 21102001113 is 31110020112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21102001113 - 2²⁴ = 21085223897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102001913) 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, 3517000183 + ... + 3517000188.

It is an arithmetic number, because the mean of its divisors is an integer number (7034000372).

Almost surely, 2^21102001113 is an apocalyptic number.

It is an amenable number.

21102001113 is a deficient number, since it is larger than the sum of its proper divisors (7034000375).

21102001113 is an equidigital number, since it uses as much as digits as its factorization.

21102001113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034000374.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21102001113 its reverse (31110020112), we get a palindrome (52212021225).

The spelling of 21102001113 in words is "twenty-one billion, one hundred two million, one thousand, one hundred thirteen".