2111113111 has 2 divisors, whose sum is σ = 2111113112. Its totient is φ = 2111113110.

The previous prime is 2111113099. The next prime is 2111113127. The reversal of 2111113111 is 1113111112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111113111 - 2²¹ = 2109015959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111113091 and 2111113100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111119111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055556555 + 1055556556.

It is an arithmetic number, because the mean of its divisors is an integer number (1055556556).

Almost surely, 2^2111113111 is an apocalyptic number.

2111113111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111113111 is an equidigital number, since it uses as much as digits as its factorization.

2111113111 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2111113111 is about 45946.8509367073. The cubic root of 2111113111 is about 1282.8341155084.

Adding to 2111113111 its reverse (1113111112), we get a palindrome (3224224223).

The spelling of 2111113111 in words is "two billion, one hundred eleven million, one hundred thirteen thousand, one hundred eleven".