Adding to 12120120 its reverse (2102121), we get a palindrome (14222241).
It is a congruent number.
It is an unprimeable number.
Almost surely, 212120120 is an apocalyptic number.
12120120 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 12120120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19922760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12120120 is a wasteful number, since it uses less digits than its factorization.
12120120 is an odious number, because the sum of its binary digits is odd.
The square root of 12120120 is about 3481.3962716129. The cubic root of 12120120 is about 229.7042196631.
The spelling of 12120120 in words is "twelve million, one hundred twenty thousand, one hundred twenty".