11111110111187 has 2 divisors, whose sum is σ = 11111110111188. Its totient is φ = 11111110111186.

The previous prime is 11111110111139. The next prime is 11111110111193. The reversal of 11111110111187 is 78111101111111.

11111110111187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111110111187 - 2²⁴ = 11111093333971 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111110117187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555555055593 + 5555555055594.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555055594).

Almost surely, 2^{11111110111187} is an apocalyptic number.

11111110111187 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111110111187 is an equidigital number, since it uses as much as digits as its factorization.

11111110111187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 26.

Adding to 11111110111187 its reverse (78111101111111), we get a palindrome (89222211222298).

The spelling of 11111110111187 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, one hundred eleven thousand, one hundred eighty-seven".