11112111119988 has 36 divisors (see below), whose sum is σ = 28089180678468. Its totient is φ = 3704006298240.

The previous prime is 11112111119987. The next prime is 11112111120029. The reversal of 11112111119988 is 88991111121111.

It can be written as a sum of positive squares in 2 ways, for example, as 8030864518884 + 3081246601104 = 2833878^2 + 1755348^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112111119987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3345870 + ... + 5780922.

Almost surely, 2^{11112111119988} is an apocalyptic number.

11112111119988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11112111119988 is an abundant number, since it is smaller than the sum of its proper divisors (16977069558480).

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

11112111119988 is a wasteful number, since it uses less digits than its factorization.

11112111119988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561824 (or 2561819 counting only the distinct ones).

The product of its digits is 10368, while the sum is 45.

The spelling of 11112111119988 in words is "eleven trillion, one hundred twelve billion, one hundred eleven million, one hundred nineteen thousand, nine hundred eighty-eight".