321220203013 has 2 divisors, whose sum is σ = 321220203014. Its totient is φ = 321220203012.

The previous prime is 321220202983. The next prime is 321220203047. The reversal of 321220203013 is 310302022123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 278512674049 + 42707528964 = 527743^2 + 206658^2 .

It is a cyclic number.

It is not a de Polignac number, because 321220203013 - 2²⁵ = 321186648581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321220203053) 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, 160610101506 + 160610101507.

It is an arithmetic number, because the mean of its divisors is an integer number (160610101507).

Almost surely, 2^321220203013 is an apocalyptic number.

It is an amenable number.

321220203013 is a deficient number, since it is larger than the sum of its proper divisors (1).

321220203013 is an equidigital number, since it uses as much as digits as its factorization.

321220203013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 321220203013 its reverse (310302022123), we get a palindrome (631522225136).

The spelling of 321220203013 in words is "three hundred twenty-one billion, two hundred twenty million, two hundred three thousand, thirteen".