Adding to 111111000000000 its reverse (111111), we get a palindrome (111111000111111).
111111000000000 divided by its reverse (111111) gives a 9-th power (1000000000 = 109).
It is a tau number, because it is divible by the number of its divisors (3200).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a zygodrome in base 10.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2111111000000000 is an apocalyptic number.
111111000000000 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 111111000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255110598876672).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
111111000000000 is an frugal number, since it uses more digits than its factorization.
111111000000000 is an odious number, because the sum of its binary digits is odd.
The spelling of 111111000000000 in words is "one hundred eleven trillion, one hundred eleven billion", and thus it is an aban number.