320223013221 has 16 divisors (see below), whose sum is σ = 440775654464. Its totient is φ = 206635981824.

The previous prime is 320223013207. The next prime is 320223013249. The reversal of 320223013221 is 122310322023.

It is a happy number.

It is not a de Polignac number, because 320223013221 - 2⁶ = 320223013157 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 (320223013021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7452391 + ... + 7495236.

It is an arithmetic number, because the mean of its divisors is an integer number (27548478404).

Almost surely, 2^320223013221 is an apocalyptic number.

It is an amenable number.

320223013221 is a deficient number, since it is larger than the sum of its proper divisors (120552641243).

320223013221 is a wasteful number, since it uses less digits than its factorization.

320223013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14947860.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 320223013221 its reverse (122310322023), we get a palindrome (442533335244).

The spelling of 320223013221 in words is "three hundred twenty billion, two hundred twenty-three million, thirteen thousand, two hundred twenty-one".