321120331 has 4 divisors (see below), whose sum is σ = 366994672. Its totient is φ = 275245992.

The previous prime is 321120307. The next prime is 321120379. The reversal of 321120331 is 133021123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133021123 = 1097 ⋅121259.

It is not a de Polignac number, because 321120331 - 2⁹ = 321119819 is a prime.

It is a super-2 number, since 2×321120331² = 206236533963099122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321120301) 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, 22937160 + ... + 22937173.

It is an arithmetic number, because the mean of its divisors is an integer number (91748668).

Almost surely, 2^321120331 is an apocalyptic number.

321120331 is a deficient number, since it is larger than the sum of its proper divisors (45874341).

321120331 is an equidigital number, since it uses as much as digits as its factorization.

321120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45874340.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321120331 is about 17919.8306632624. The cubic root of 321120331 is about 684.7876735504.

Adding to 321120331 its reverse (133021123), we get a palindrome (454141454).

The spelling of 321120331 in words is "three hundred twenty-one million, one hundred twenty thousand, three hundred thirty-one".