321311201 has 4 divisors (see below), whose sum is σ = 321841152. Its totient is φ = 320781252.

The previous prime is 321311197. The next prime is 321311209. The reversal of 321311201 is 102113123.

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 321311201 - 2² = 321311197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321311209) 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, 264065 + ... + 265278.

It is an arithmetic number, because the mean of its divisors is an integer number (80460288).

Almost surely, 2^321311201 is an apocalyptic number.

It is an amenable number.

321311201 is a deficient number, since it is larger than the sum of its proper divisors (529951).

321311201 is an equidigital number, since it uses as much as digits as its factorization.

321311201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529950.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 321311201 is about 17925.1555362848. The cubic root of 321311201 is about 684.9233231523.

Adding to 321311201 its reverse (102113123), we get a palindrome (423424324).

The spelling of 321311201 in words is "three hundred twenty-one million, three hundred eleven thousand, two hundred one".