It is a happy number.
12102221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
Almost surely, 212102221 is an apocalyptic number.
It is an amenable number.
12102221 is a wasteful number, since it uses less digits than its factorization.
12102221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 14875.
The square root of 12102221 is about 3478.8246578406. The cubic root of 12102221 is about 229.5910881805.
Adding to 12102221 its reverse (12220121), we get a palindrome (24322342).
The spelling of 12102221 in words is "twelve million, one hundred two thousand, two hundred twenty-one".