Adding to 11111111111000 its reverse (11111111111), we get a palindrome (11122222222111).
11111111111000 divided by its reverse (11111111111) gives a cube (1000 = 103).
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, 211111111111000 is an apocalyptic number.
11111111111000 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 pseudoperfect number, because it is the sum of a subset of its proper divisors.
11111111111000 is a wasteful number, since it uses less digits than its factorization.
11111111111000 is an evil number, because the sum of its binary digits is even.
The spelling of 11111111111000 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand".