Adding to 12101120 its reverse (2110121), we get a palindrome (14211241).
Subtracting from 12101120 its reverse (2110121), we obtain a palindrome (9990999).
It is a tau number, because it is divible by the number of its divisors (80).
It is a congruent number.
Almost surely, 212101120 is an apocalyptic number.
12101120 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 12101120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15099480).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12101120 is an equidigital number, since it uses as much as digits as its factorization.
12101120 is an evil number, because the sum of its binary digits is even.
The square root of 12101120 is about 3478.6664111409. Note that the first 3 decimals coincide. The cubic root of 12101120 is about 229.5841256168.
The spelling of 12101120 in words is "twelve million, one hundred one thousand, one hundred twenty".