221321333221 has 8 divisors (see below), whose sum is σ = 224917285824. Its totient is φ = 217747510080.

The previous prime is 221321333153. The next prime is 221321333251. The reversal of 221321333221 is 122333123122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221321333221 - 2¹¹ = 221321331173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321333251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5512201 + ... + 5552206.

It is an arithmetic number, because the mean of its divisors is an integer number (28114660728).

Almost surely, 2^221321333221 is an apocalyptic number.

It is an amenable number.

221321333221 is a deficient number, since it is larger than the sum of its proper divisors (3595952603).

221321333221 is a wasteful number, since it uses less digits than its factorization.

221321333221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064731.

The product of its digits is 2592, while the sum is 25.

Adding to 221321333221 its reverse (122333123122), we get a palindrome (343654456343).

The spelling of 221321333221 in words is "two hundred twenty-one billion, three hundred twenty-one million, three hundred thirty-three thousand, two hundred twenty-one".