320221323221321 has 8 divisors (see below), whose sum is σ = 329483857395144. Its totient is φ = 310990783985280.

The previous prime is 320221323221279. The next prime is 320221323221353. The reversal of 320221323221321 is 123122323122023.

It can be written as a sum of positive squares in 4 ways, for example, as 40363086708025 + 279858236513296 = 6353195^2 + 16728964^2 .

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 320221323221321 - 2³⁰ = 320220249479497 is a prime.

It is a super-2 number, since 2×320221323221321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320221323221021) 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 7 ways as a sum of consecutive naturals, for example, 7998714140 + ... + 7998754173.

It is an arithmetic number, because the mean of its divisors is an integer number (41185482174393).

Almost surely, 2^{320221323221321} is an apocalyptic number.

It is an amenable number.

320221323221321 is a deficient number, since it is larger than the sum of its proper divisors (9262534173823).

320221323221321 is a wasteful number, since it uses less digits than its factorization.

320221323221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15997468891.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 320221323221321 its reverse (123122323122023), we get a palindrome (443343646343344).

The spelling of 320221323221321 in words is "three hundred twenty trillion, two hundred twenty-one billion, three hundred twenty-three million, two hundred twenty-one thousand, three hundred twenty-one".