1111111118111 has 2 divisors, whose sum is σ = 1111111118112. Its totient is φ = 1111111118110.

The previous prime is 1111111118071. The next prime is 1111111118153. The reversal of 1111111118111 is 1118111111111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111111118111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111111108111) 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, 555555559055 + 555555559056.

It is an arithmetic number, because the mean of its divisors is an integer number (555555559056).

Almost surely, 2^{1111111118111} is an apocalyptic number.

1111111118111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111111118111 is an equidigital number, since it uses as much as digits as its factorization.

1111111118111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8, while the sum is 20.

Adding to 1111111118111 its reverse (1118111111111), we get a palindrome (2229222229222).

The spelling of 1111111118111 in words is "one trillion, one hundred eleven billion, one hundred eleven million, one hundred eighteen thousand, one hundred eleven".