It is a happy number.
12220 is nontrivially palindromic in base 3.
It is a congruent number.
12220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
212220 is an apocalyptic number.
12220 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 12220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14112).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12220 is a wasteful number, since it uses less digits than its factorization.
12220 is an evil number, because the sum of its binary digits is even.
The square root of 12220 is about 110.5441088435. The cubic root of 12220 is about 23.0333479703.
Adding to 12220 its reverse (2221), we get a palindrome (14441).
Subtracting from 12220 its reverse (2221), we obtain a palindrome (9999).
The spelling of 12220 in words is "twelve thousand, two hundred twenty", and thus it is an iban number.