111888888111 has 256 divisors, whose sum is σ = 234236620800. Its totient is φ = 50911027200.

The previous prime is 111888888079. The next prime is 111888888227.

111888888111 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 111888888111 - 2⁵ = 111888888079 is a prime.

111888888111 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111888888911) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 40998595 + ... + 41001323.

It is an arithmetic number, because the mean of its divisors is an integer number (914986800).

Almost surely, 2^111888888111 is an apocalyptic number.

111888888111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111888888111 is an abundant number, since it is smaller than the sum of its proper divisors (122347732689).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111888888111 is a wasteful number, since it uses less digits than its factorization.

111888888111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847 (or 2841 counting only the distinct ones).

The product of its digits is 262144, while the sum is 54.

It can be divided in two parts, 111888 and 888111, that added together give a palindrome (999999).

The spelling of 111888888111 in words is "one hundred eleven billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, one hundred eleven".