320122013221 has 4 divisors (see below), whose sum is σ = 327929867244. Its totient is φ = 312314159200.

The previous prime is 320122013213. The next prime is 320122013227. The reversal of 320122013221 is 122310221023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122310221023 = 57917 ⋅2111819.

It can be written as a sum of positive squares in 2 ways, for example, as 104319956196 + 215802057025 = 322986^2 + 464545^2 .

It is a cyclic number.

It is not a de Polignac number, because 320122013221 - 2³ = 320122013213 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 (320122013227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3903926950 + ... + 3903927031.

It is an arithmetic number, because the mean of its divisors is an integer number (81982466811).

Almost surely, 2^320122013221 is an apocalyptic number.

It is an amenable number.

320122013221 is a deficient number, since it is larger than the sum of its proper divisors (7807854023).

320122013221 is an equidigital number, since it uses as much as digits as its factorization.

320122013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7807854022.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 320122013221 its reverse (122310221023), we get a palindrome (442432234244).

The spelling of 320122013221 in words is "three hundred twenty billion, one hundred twenty-two million, thirteen thousand, two hundred twenty-one".