Adding to 12120 its reverse (2121), we get a palindrome (14241).
Subtracting from 12120 its reverse (2121), we obtain a palindrome (9999).
It is a happy number.
12120 is nontrivially palindromic in base 11.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a congruent number.
It is an unprimeable number.
212120 is an apocalyptic number.
12120 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 12120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12120 is a wasteful number, since it uses less digits than its factorization.
12120 is an evil number, because the sum of its binary digits is even.
The square root of 12120 is about 110.0908715562. The cubic root of 12120 is about 22.9703461568.
The spelling of 12120 in words is "twelve thousand, one hundred twenty", and thus it is an iban number.