2100111113 has 4 divisors (see below), whose sum is σ = 2100514068. Its totient is φ = 2099708160.

The previous prime is 2100111109. The next prime is 2100111119. The reversal of 2100111113 is 3111110012.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 943226944 + 1156884169 = 30712^2 + 34013^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100111113 - 2² = 2100111109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2100111094 and 2100111103.

It is not an unprimeable number, because it can be changed into a prime (2100111119) 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, 193556 + ... + 204117.

It is an arithmetic number, because the mean of its divisors is an integer number (525128517).

Almost surely, 2^2100111113 is an apocalyptic number.

It is an amenable number.

2100111113 is a deficient number, since it is larger than the sum of its proper divisors (402955).

2100111113 is an equidigital number, since it uses as much as digits as its factorization.

2100111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402954.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 2100111113 is about 45826.9692757442. The cubic root of 2100111113 is about 1280.6017501436.

Adding to 2100111113 its reverse (3111110012), we get a palindrome (5211221125).

The spelling of 2100111113 in words is "two billion, one hundred million, one hundred eleven thousand, one hundred thirteen".