331321201 has 6 divisors (see below), whose sum is σ = 343140902. Its totient is φ = 319895520.

The previous prime is 331321171. The next prime is 331321219. The reversal of 331321201 is 102123133.

It can be written as a sum of positive squares in 3 ways, for example, as 17181025 + 314140176 = 4145^2 + 17724^2 .

It is not a de Polignac number, because 331321201 - 2¹⁹ = 330796913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331321271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196140 + ... + 197821.

Almost surely, 2^331321201 is an apocalyptic number.

It is an amenable number.

331321201 is a deficient number, since it is larger than the sum of its proper divisors (11819701).

331321201 is an equidigital number, since it uses as much as digits as its factorization.

331321201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394019 (or 393990 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 331321201 is about 18202.2306600043. The cubic root of 331321201 is about 691.9633230642.

Adding to 331321201 its reverse (102123133), we get a palindrome (433444334).

The spelling of 331321201 in words is "three hundred thirty-one million, three hundred twenty-one thousand, two hundred one".