201321321 has 16 divisors (see below), whose sum is σ = 282992640. Its totient is φ = 126954000.

The previous prime is 201321319. The next prime is 201321331. The reversal of 201321321 is 123123102.

It is not a de Polignac number, because 201321321 - 2¹ = 201321319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201321321.

It is not an unprimeable number, because it can be changed into a prime (201321301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40456 + ... + 45158.

It is an arithmetic number, because the mean of its divisors is an integer number (17687040).

Almost surely, 2^201321321 is an apocalyptic number.

It is an amenable number.

201321321 is a deficient number, since it is larger than the sum of its proper divisors (81671319).

201321321 is a wasteful number, since it uses less digits than its factorization.

201321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 201321321 is about 14188.7744713911. The cubic root of 201321321 is about 586.0885772365.

Adding to 201321321 its reverse (123123102), we get a palindrome (324444423).

The spelling of 201321321 in words is "two hundred one million, three hundred twenty-one thousand, three hundred twenty-one".