321404441321321 has 4 divisors (see below), whose sum is σ = 321404830127700. Its totient is φ = 321404052514944.

The previous prime is 321404441321267. The next prime is 321404441321347. The reversal of 321404441321321 is 123123144404123.

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 196350856875625 + 125053584445696 = 14012525^2 + 11182736^2 .

It is a cyclic number.

It is not a de Polignac number, because 321404441321321 - 2¹⁰ = 321404441320297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321404441321921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193160576 + ... + 194817393.

It is an arithmetic number, because the mean of its divisors is an integer number (80351207531925).

Almost surely, 2^{321404441321321} is an apocalyptic number.

It is an amenable number.

321404441321321 is a deficient number, since it is larger than the sum of its proper divisors (388806379).

321404441321321 is an equidigital number, since it uses as much as digits as its factorization.

321404441321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388806378.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 321404441321321 its reverse (123123144404123), we get a palindrome (444527585725444).

The spelling of 321404441321321 in words is "three hundred twenty-one trillion, four hundred four billion, four hundred forty-one million, three hundred twenty-one thousand, three hundred twenty-one".