11855111 has 2 divisors, whose sum is σ = 11855112. Its totient is φ = 11855110.

The previous prime is 11855033. The next prime is 11855141. The reversal of 11855111 is 11155811.

11855111 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 11855111 - 2¹⁴ = 11838727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11855141) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5927555 + 5927556.

It is an arithmetic number, because the mean of its divisors is an integer number (5927556).

Almost surely, 2^11855111 is an apocalyptic number.

11855111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11855111 is an equidigital number, since it uses as much as digits as its factorization.

11855111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200, while the sum is 23.

The square root of 11855111 is about 3443.1251792521. The cubic root of 11855111 is about 228.0176899684.

The spelling of 11855111 in words is "eleven million, eight hundred fifty-five thousand, one hundred eleven".