111111100000 has 144 divisors (see below), whose sum is σ = 274623048000. Its totient is φ = 44248960000.

The previous prime is 111111099991. The next prime is 111111100007. The reversal of 111111100000 is 1111111.

It is a happy number.

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 (111111100007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23897676 + ... + 23902324.

It is an arithmetic number, because the mean of its divisors is an integer number (1907104500).

Almost surely, 2^111111100000 is an apocalyptic number.

111111100000 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 111111100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137311524000).

111111100000 is an abundant number, since it is smaller than the sum of its proper divisors (163511948000).

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

111111100000 is an frugal number, since it uses more digits than its factorization.

111111100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923 (or 4895 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 111111100000 its reverse (1111111), we get a palindrome (111112211111).

111111100000 divided by its reverse (1111111) gives a 5-th power (100000 = 10⁵).

It can be divided in two parts, 11111 and 1100000, that added together give a palindrome (1111111).

The spelling of 111111100000 in words is "one hundred eleven billion, one hundred eleven million, one hundred thousand".