111100000000 has 324 divisors, whose sum is σ = 305402187384. Its totient is φ = 40000000000.

The previous prime is 111099999979. The next prime is 111100000003. The reversal of 111100000000 is 1111.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a nialpdrome in base 10.

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 (111100000003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1099999950 + ... + 1100000050.

Almost surely, 2^111100000000 is an apocalyptic number.

111100000000 is a gapful number since it is divisible by the number (10) 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 111100000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152701093692).

111100000000 is an abundant number, since it is smaller than the sum of its proper divisors (194302187384).

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

111100000000 is an frugal number, since it uses more digits than its factorization.

111100000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 4.

Adding to 111100000000 its reverse (1111), we get a palindrome (111100001111).

Multiplying 111100000000 by its reverse (1111), we get a square (123432100000000 = 11110000²).

111100000000 divided by its reverse (1111) gives a 8-th power (100000000 = 10⁸).

It can be divided in two parts, 11 and 1100000000, that multiplied together give a square (12100000000 = 110000²).

The spelling of 111100000000 in words is "one hundred eleven billion, one hundred million", and thus it is an aban number.