It is a happy number.
200221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122002 = 2 ⋅61001.
It is a Duffinian number.
It is a plaindrome in base 9.
It is a congruent number.
2200221 is an apocalyptic number.
It is an amenable number.
200221 is an equidigital number, since it uses as much as digits as its factorization.
200221 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 28610.
The square root of 200221 is about 447.4606127918. The cubic root of 200221 is about 58.5018870991.
Adding to 200221 its reverse (122002), we get a palindrome (322223).
The spelling of 200221 in words is "two hundred thousand, two hundred twenty-one", and thus it is an iban number.