201312321 has 32 divisors (see below), whose sum is σ = 311592960. Its totient is φ = 113241216.

The previous prime is 201312299. The next prime is 201312341. The reversal of 201312321 is 123213102.

It is not a de Polignac number, because 201312321 - 2⁵ = 201312289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201312321.

It is not an unprimeable number, because it can be changed into a prime (201312341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480250 + ... + 480668.

It is an arithmetic number, because the mean of its divisors is an integer number (9737280).

Almost surely, 2^201312321 is an apocalyptic number.

201312321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201312321 is a deficient number, since it is larger than the sum of its proper divisors (110280639).

201312321 is a wasteful number, since it uses less digits than its factorization.

201312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733.

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

The square root of 201312321 is about 14188.4573157197. The cubic root of 201312321 is about 586.0798434774.

Adding to 201312321 its reverse (123213102), we get a palindrome (324525423).

The spelling of 201312321 in words is "two hundred one million, three hundred twelve thousand, three hundred twenty-one".