320320321121 has 4 divisors (see below), whose sum is σ = 322765514544. Its totient is φ = 317875127700.

The previous prime is 320320321117. The next prime is 320320321129. The reversal of 320320321121 is 121123023023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320320321121 - 2² = 320320321117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320320321093 and 320320321102.

It is not an unprimeable number, because it can be changed into a prime (320320321129) 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, 1222596515 + ... + 1222596776.

It is an arithmetic number, because the mean of its divisors is an integer number (80691378636).

Almost surely, 2^320320321121 is an apocalyptic number.

It is an amenable number.

320320321121 is a deficient number, since it is larger than the sum of its proper divisors (2445193423).

320320321121 is a wasteful number, since it uses less digits than its factorization.

320320321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445193422.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 320320321121 its reverse (121123023023), we get a palindrome (441443344144).

The spelling of 320320321121 in words is "three hundred twenty billion, three hundred twenty million, three hundred twenty-one thousand, one hundred twenty-one".