201331321 has 2 divisors, whose sum is σ = 201331322.
Its totient is φ = 201331320.
The previous prime is 201331271. The next prime is 201331327. The reversal of 201331321 is 123133102.
Adding to 201331321 its reverse (123133102), we get a palindrome (324464423).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 201327721 + 3600 = 14189^2 + 60^2
It is a cyclic number.
It is not a de Polignac number, because 201331321 - 217 = 201200249 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 201331295 and 201331304.
It is not a weakly prime, because it can be changed into another prime (201331327) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100665660 + 100665661.
It is an arithmetic number, because the mean of its divisors is an integer number (100665661).
Almost surely, 2201331321 is an apocalyptic number.
It is an amenable number.
201331321 is a deficient number, since it is larger than the sum of its proper divisors (1).
201331321 is an equidigital number, since it uses as much as digits as its factorization.
201331321 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 108, while the sum is 16.
The square root of 201331321 is about 14189.1268582672.
The cubic root of 201331321 is about 586.0982811081.
The spelling of 201331321 in words is "two hundred one million, three hundred thirty-one thousand, three hundred twenty-one".