321240203201 has 2 divisors, whose sum is σ = 321240203202. Its totient is φ = 321240203200.

The previous prime is 321240203191. The next prime is 321240203239. The reversal of 321240203201 is 102302042123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259834867600 + 61405335601 = 509740^2 + 247801^2 .

It is an emirp because it is prime and its reverse (102302042123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321240203201 is a prime.

It is not a weakly prime, because it can be changed into another prime (321240203701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160620101600 + 160620101601.

It is an arithmetic number, because the mean of its divisors is an integer number (160620101601).

Almost surely, 2^321240203201 is an apocalyptic number.

It is an amenable number.

321240203201 is a deficient number, since it is larger than the sum of its proper divisors (1).

321240203201 is an equidigital number, since it uses as much as digits as its factorization.

321240203201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 321240203201 its reverse (102302042123), we get a palindrome (423542245324).

The spelling of 321240203201 in words is "three hundred twenty-one billion, two hundred forty million, two hundred three thousand, two hundred one".