201310321 has 2 divisors, whose sum is σ = 201310322. Its totient is φ = 201310320.

The previous prime is 201310273. The next prime is 201310349. The reversal of 201310321 is 123013102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198951025 + 2359296 = 14105^2 + 1536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201310321 is a prime.

It is a super-2 number, since 2×201310321² = 81051690682246082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201316321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100655160 + 100655161.

It is an arithmetic number, because the mean of its divisors is an integer number (100655161).

Almost surely, 2^201310321 is an apocalyptic number.

It is an amenable number.

201310321 is a deficient number, since it is larger than the sum of its proper divisors (1).

201310321 is an equidigital number, since it uses as much as digits as its factorization.

201310321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 201310321 is about 14188.3868357189. The cubic root of 201310321 is about 586.0779026067.

Adding to 201310321 its reverse (123013102), we get a palindrome (324323423).

The spelling of 201310321 in words is "two hundred one million, three hundred ten thousand, three hundred twenty-one".