241221 has 4 divisors (see below), whose sum is σ = 321632. Its totient is φ = 160812.

The previous prime is 241207. The next prime is 241229. The reversal of 241221 is 122142.

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.

It is not a de Polignac number, because 241221 - 2⁷ = 241093 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 241197 and 241206.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 241221.

It is not an unprimeable number, because it can be changed into a prime (241229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40201 + ... + 40206.

It is an arithmetic number, because the mean of its divisors is an integer number (80408).

2²⁴¹²²¹ is an apocalyptic number.

It is an amenable number.

241221 is a deficient number, since it is larger than the sum of its proper divisors (80411).

241221 is an equidigital number, since it uses as much as digits as its factorization.

241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80410.

The product of its digits is 32, while the sum is 12.

The square root of 241221 is about 491.1425454998. The cubic root of 241221 is about 62.2498588729.

Adding to 241221 its reverse (122142), we get a palindrome (363363).

The spelling of 241221 in words is "two hundred forty-one thousand, two hundred twenty-one", and thus it is an iban number.