111100091112 has 96 divisors (see below), whose sum is σ = 314771258880. Its totient is φ = 35333781120.

The previous prime is 111100091101. The next prime is 111100091153. The reversal of 111100091112 is 211190001111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 572937 + ... + 741927.

It is an arithmetic number, because the mean of its divisors is an integer number (3278867280).

Almost surely, 2^111100091112 is an apocalyptic number.

111100091112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111100091112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157385629440).

111100091112 is an abundant number, since it is smaller than the sum of its proper divisors (203671167768).

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

111100091112 is a wasteful number, since it uses less digits than its factorization.

111100091112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169423 (or 169416 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 18.

Adding to 111100091112 its reverse (211190001111), we get a palindrome (322290092223).

The spelling of 111100091112 in words is "one hundred eleven billion, one hundred million, ninety-one thousand, one hundred twelve".