321213202003321 has 4 divisors (see below), whose sum is σ = 323557823915892. Its totient is φ = 318868580090752.

The previous prime is 321213202003301. The next prime is 321213202003433. The reversal of 321213202003321 is 123300202312123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 190373462212921 + 130839739790400 = 13797589^2 + 11438520^2 .

It is a cyclic number.

It is not a de Polignac number, because 321213202003321 - 2⁷ = 321213202003193 is a prime.

It is a super-2 number, since 2×321213202003321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321213202003301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172310956080 + ... + 1172310956353.

It is an arithmetic number, because the mean of its divisors is an integer number (80889455978973).

Almost surely, 2^{321213202003321} is an apocalyptic number.

It is an amenable number.

321213202003321 is a deficient number, since it is larger than the sum of its proper divisors (2344621912571).

321213202003321 is a wasteful number, since it uses less digits than its factorization.

321213202003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344621912570.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 321213202003321 its reverse (123300202312123), we get a palindrome (444513404315444).

The spelling of 321213202003321 in words is "three hundred twenty-one trillion, two hundred thirteen billion, two hundred two million, three thousand, three hundred twenty-one".