320031121 has 4 divisors (see below), whose sum is σ = 320067072. Its totient is φ = 319995172.

The previous prime is 320031097. The next prime is 320031169. The reversal of 320031121 is 121130023.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 121130023 = 7 ⋅17304289.

It is a cyclic number.

It is not a de Polignac number, because 320031121 - 2⁹ = 320030609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320031191) 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, 6360 + ... + 26086.

It is an arithmetic number, because the mean of its divisors is an integer number (80016768).

Almost surely, 2^320031121 is an apocalyptic number.

It is an amenable number.

320031121 is a deficient number, since it is larger than the sum of its proper divisors (35951).

320031121 is a wasteful number, since it uses less digits than its factorization.

320031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35950.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 320031121 is about 17889.4136572443. The cubic root of 320031121 is about 684.0125513525.

Adding to 320031121 its reverse (121130023), we get a palindrome (441161144).

It can be divided in two parts, 32003 and 1121, that added together give a square (33124 = 182²).

The spelling of 320031121 in words is "three hundred twenty million, thirty-one thousand, one hundred twenty-one".