321440021201 has 4 divisors (see below), whose sum is σ = 346166176692. Its totient is φ = 296713865712.

The previous prime is 321440021183. The next prime is 321440021209. The reversal of 321440021201 is 102120044123.

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 30324739600 + 291115281601 = 174140^2 + 539551^2 .

It is a cyclic number.

It is not a de Polignac number, because 321440021201 - 2¹⁴ = 321440004817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321440021209) 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, 12363077726 + ... + 12363077751.

It is an arithmetic number, because the mean of its divisors is an integer number (86541544173).

Almost surely, 2^321440021201 is an apocalyptic number.

It is an amenable number.

321440021201 is a deficient number, since it is larger than the sum of its proper divisors (24726155491).

321440021201 is a wasteful number, since it uses less digits than its factorization.

321440021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24726155490.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 321440021201 its reverse (102120044123), we get a palindrome (423560065324).

The spelling of 321440021201 in words is "three hundred twenty-one billion, four hundred forty million, twenty-one thousand, two hundred one".