111109991136 has 192 divisors, whose sum is σ = 300754944000. Its totient is φ = 35905199616.

The previous prime is 111109991107. The next prime is 111109991143. The reversal of 111109991136 is 631199901111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125264485 + ... + 125265371.

It is an arithmetic number, because the mean of its divisors is an integer number (1566432000).

Almost surely, 2^111109991136 is an apocalyptic number.

111109991136 is a gapful number since it is divisible by the number (16) 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 111109991136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150377472000).

111109991136 is an abundant number, since it is smaller than the sum of its proper divisors (189644952864).

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

111109991136 is a wasteful number, since it uses less digits than its factorization.

111109991136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1261 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 42.

The spelling of 111109991136 in words is "one hundred eleven billion, one hundred nine million, nine hundred ninety-one thousand, one hundred thirty-six".