320233121 has 4 divisors (see below), whose sum is σ = 344866452. Its totient is φ = 295599792.

The previous prime is 320233091. The next prime is 320233139. The reversal of 320233121 is 121332023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84180625 + 236052496 = 9175^2 + 15364^2 .

It is a cyclic number.

It is not a de Polignac number, because 320233121 - 2¹⁸ = 319970977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320233121.

It is not an unprimeable number, because it can be changed into a prime (320233141) 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, 12316646 + ... + 12316671.

It is an arithmetic number, because the mean of its divisors is an integer number (86216613).

Almost surely, 2^320233121 is an apocalyptic number.

It is an amenable number.

320233121 is a deficient number, since it is larger than the sum of its proper divisors (24633331).

320233121 is a wasteful number, since it uses less digits than its factorization.

320233121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24633330.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 320233121 is about 17895.0585637488. The cubic root of 320233121 is about 684.1564347292.

Adding to 320233121 its reverse (121332023), we get a palindrome (441565144).

The spelling of 320233121 in words is "three hundred twenty million, two hundred thirty-three thousand, one hundred twenty-one".