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: 140122 = 2 ⋅70061.
It is a cyclic number.
It is a Duffinian number.
2221041 is an apocalyptic number.
It is an amenable number.
221041 is an equidigital number, since it uses as much as digits as its factorization.
221041 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4750.
The square root of 221041 is about 470.1499760715. The cubic root of 221041 is about 60.4631745478.
Adding to 221041 its reverse (140122), we get a palindrome (361163).
The spelling of 221041 in words is "two hundred twenty-one thousand, forty-one", and thus it is an iban number.