320302121 has 4 divisors (see below), whose sum is σ = 320348544. Its totient is φ = 320255700.

The previous prime is 320302111. The next prime is 320302123. The reversal of 320302121 is 121203023.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 121203023 = 8867 ⋅13669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320302121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320302096 and 320302105.

It is not an unprimeable number, because it can be changed into a prime (320302123) 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, 10565 + ... + 27426.

It is an arithmetic number, because the mean of its divisors is an integer number (80087136).

Almost surely, 2^320302121 is an apocalyptic number.

It is an amenable number.

320302121 is a deficient number, since it is larger than the sum of its proper divisors (46423).

320302121 is an equidigital number, since it uses as much as digits as its factorization.

320302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46422.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 320302121 is about 17896.9863664249. The cubic root of 320302121 is about 684.2055691470.

Adding to 320302121 its reverse (121203023), we get a palindrome (441505144).

The spelling of 320302121 in words is "three hundred twenty million, three hundred two thousand, one hundred twenty-one".