It is a happy number.
It is a congruent number.
It is an unprimeable number.
Almost surely, 21111020000120 is an apocalyptic number.
1111020000120 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.
1111020000120 is a wasteful number, since it uses less digits than its factorization.
1111020000120 is an evil number, because the sum of its binary digits is even.
Adding to 1111020000120 its reverse (210000201111), we get a palindrome (1321020201231).
The spelling of 1111020000120 in words is "one trillion, one hundred eleven billion, twenty million, one hundred twenty", and thus it is an aban number.