221221224241 has 4 divisors (see below), whose sum is σ = 221571813184. Its totient is φ = 220870635300.

The previous prime is 221221224227. The next prime is 221221224253. The reversal of 221221224241 is 142422122122.

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 a cyclic number.

It is not a de Polignac number, because 221221224241 - 2⁷ = 221221224113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221224841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175293525 + ... + 175294786.

It is an arithmetic number, because the mean of its divisors is an integer number (55392953296).

Almost surely, 2^221221224241 is an apocalyptic number.

It is an amenable number.

221221224241 is a deficient number, since it is larger than the sum of its proper divisors (350588943).

221221224241 is an equidigital number, since it uses as much as digits as its factorization.

221221224241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350588942.

The product of its digits is 2048, while the sum is 25.

Adding to 221221224241 its reverse (142422122122), we get a palindrome (363643346363).

The spelling of 221221224241 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-four thousand, two hundred forty-one".