111110888889 has 405 divisors, whose sum is σ = 236187578781. Its totient is φ = 51839948160.

The previous prime is 111110888881. The next prime is 111110888891. The reversal of 111110888889 is 988888011111.

The square root of 111110888889 is 333333.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 461519289 + 110649369600 = 21483^2 + 332640^2 .

It is not a de Polignac number, because 111110888889 - 2³ = 111110888881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111110888881) by changing a digit.

It is a polite number, since it can be written in 404 ways as a sum of consecutive naturals, for example, 3002996979 + ... + 3002997015.

Almost surely, 2^111110888889 is an apocalyptic number.

111110888889 is the 333333-rd square number.

111110888889 is the 166667-th centered octagonal number.

It is an amenable number.

111110888889 is an abundant number, since it is smaller than the sum of its proper divisors (125076689892).

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

111110888889 is a wasteful number, since it uses less digits than its factorization.

111110888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 54.

It can be divided in two parts, 111110 and 888889, that added together give a palindrome (999999).

The spelling of 111110888889 in words is "one hundred eleven billion, one hundred ten million, eight hundred eighty-eight thousand, eight hundred eighty-nine".