212212 is nontrivially palindromic in base 10.
It is a nude number because it is divisible by every one of its digits.
It is a congruent number.
It is an unprimeable number.
2212212 is an apocalyptic number.
212212 is a gapful number since it is divisible by the number (22) 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 212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254016).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212212 is a wasteful number, since it uses less digits than its factorization.
212212 is an odious number, because the sum of its binary digits is odd.
The square root of 212212 is about 460.6647370920. The cubic root of 212212 is about 59.6471887290.
The spelling of 212212 in words is "two hundred twelve thousand, two hundred twelve", and thus it is an iban number.