221223224441 has 4 divisors (see below), whose sum is σ = 226618912884. Its totient is φ = 215827536000.

The previous prime is 221223224429. The next prime is 221223224513. The reversal of 221223224441 is 144422322122.

221223224441 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.

It can be written as a sum of positive squares in 2 ways, for example, as 19294321216 + 201928903225 = 138904^2 + 449365^2 .

It is a cyclic number.

It is not a de Polignac number, because 221223224441 - 2¹⁴ = 221223208057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221223224401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2697844160 + ... + 2697844241.

It is an arithmetic number, because the mean of its divisors is an integer number (56654728221).

Almost surely, 2^221223224441 is an apocalyptic number.

It is an amenable number.

221223224441 is a deficient number, since it is larger than the sum of its proper divisors (5395688443).

221223224441 is an equidigital number, since it uses as much as digits as its factorization.

221223224441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395688442.

The product of its digits is 12288, while the sum is 29.

Adding to 221223224441 its reverse (144422322122), we get a palindrome (365645546563).

The spelling of 221223224441 in words is "two hundred twenty-one billion, two hundred twenty-three million, two hundred twenty-four thousand, four hundred forty-one".