2113331111 has 2 divisors, whose sum is σ = 2113331112. Its totient is φ = 2113331110.

The previous prime is 2113331029. The next prime is 2113331113. The reversal of 2113331111 is 1111333112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113331111 is a prime.

Together with 2113331113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113331111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113331113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056665555 + 1056665556.

It is an arithmetic number, because the mean of its divisors is an integer number (1056665556).

Almost surely, 2^2113331111 is an apocalyptic number.

2113331111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113331111 is an equidigital number, since it uses as much as digits as its factorization.

2113331111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 17.

The square root of 2113331111 is about 45970.9811837859. The cubic root of 2113331111 is about 1283.2832198493.

Adding to 2113331111 its reverse (1111333112), we get a palindrome (3224664223).

It can be divided in two parts, 211333111 and 1, that added together give a palindrome (211333112).

The spelling of 2113331111 in words is "two billion, one hundred thirteen million, three hundred thirty-one thousand, one hundred eleven".