221321312323 has 8 divisors (see below), whose sum is σ = 226240629440. Its totient is φ = 216449525160.

The previous prime is 221321312287. The next prime is 221321312347. The reversal of 221321312323 is 323213123122.

221321312323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221321312323 - 2⁹ = 221321311811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221321312123) 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 7 ways as a sum of consecutive naturals, for example, 11873073 + ... + 11891698.

It is an arithmetic number, because the mean of its divisors is an integer number (28280078680).

Almost surely, 2^221321312323 is an apocalyptic number.

221321312323 is a deficient number, since it is larger than the sum of its proper divisors (4919317117).

221321312323 is a wasteful number, since it uses less digits than its factorization.

221321312323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23764977.

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

Adding to 221321312323 its reverse (323213123122), we get a palindrome (544534435445).

The spelling of 221321312323 in words is "two hundred twenty-one billion, three hundred twenty-one million, three hundred twelve thousand, three hundred twenty-three".