2111111113 has 4 divisors (see below), whose sum is σ = 2114315280. Its totient is φ = 2107906948.

The previous prime is 2111111099. The next prime is 2111111137. The reversal of 2111111113 is 3111111112.

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 a cyclic number.

It is not a de Polignac number, because 2111111113 - 2²¹ = 2109013961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111111093 and 2111111102.

It is not an unprimeable number, because it can be changed into a prime (2111111213) 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, 1601095 + ... + 1602412.

It is an arithmetic number, because the mean of its divisors is an integer number (528578820).

Almost surely, 2^2111111113 is an apocalyptic number.

It is an amenable number.

2111111113 is a deficient number, since it is larger than the sum of its proper divisors (3204167).

2111111113 is an equidigital number, since it uses as much as digits as its factorization.

2111111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204166.

The product of its digits is 6, while the sum is 13.

The square root of 2111111113 is about 45946.8291941892. The cubic root of 2111111113 is about 1282.8337108082.

Adding to 2111111113 its reverse (3111111112), we get a palindrome (5222222225).

Subtracting 2111111113 from its reverse (3111111112), we obtain a palindrome (999999999).

The spelling of 2111111113 in words is "two billion, one hundred eleven million, one hundred eleven thousand, one hundred thirteen".