12118111 has 2 divisors, whose sum is σ = 12118112. Its totient is φ = 12118110.

The previous prime is 12118109. The next prime is 12118153. The reversal of 12118111 is 11181121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12118111 - 2¹ = 12118109 is a prime.

It is a super-2 number, since 2×12118111² = 293697228416642, which contains 22 as substring.

Together with 12118109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12118811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6059055 + 6059056.

It is an arithmetic number, because the mean of its divisors is an integer number (6059056).

Almost surely, 2^12118111 is an apocalyptic number.

12118111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12118111 is an equidigital number, since it uses as much as digits as its factorization.

12118111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16, while the sum is 16.

The square root of 12118111 is about 3481.1077259976. The cubic root of 12118111 is about 229.6915272344.

Adding to 12118111 its reverse (11181121), we get a palindrome (23299232).

It can be divided in two parts, 1 and 2118111, that added together give a palindrome (2118112).

The spelling of 12118111 in words is "twelve million, one hundred eighteen thousand, one hundred eleven".