320313042221 has 4 divisors (see below), whose sum is σ = 320327892444. Its totient is φ = 320298192000.

The previous prime is 320313042199. The next prime is 320313042239. The reversal of 320313042221 is 122240313023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122240313023 = 1049 ⋅116530327.

It can be written as a sum of positive squares in 2 ways, for example, as 203864892196 + 116448150025 = 451514^2 + 341245^2 .

It is a cyclic number.

It is not a de Polignac number, because 320313042221 - 2³⁰ = 319239300397 is a prime.

It is a super-2 number, since 2×320313042221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320313042281) 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, 7392710 + ... + 7435911.

It is an arithmetic number, because the mean of its divisors is an integer number (80081973111).

Almost surely, 2^320313042221 is an apocalyptic number.

It is an amenable number.

320313042221 is a deficient number, since it is larger than the sum of its proper divisors (14850223).

320313042221 is a wasteful number, since it uses less digits than its factorization.

320313042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14850222.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 320313042221 its reverse (122240313023), we get a palindrome (442553355244).

The spelling of 320313042221 in words is "three hundred twenty billion, three hundred thirteen million, forty-two thousand, two hundred twenty-one".