321443040321 has 12 divisors (see below), whose sum is σ = 500022507348. Its totient is φ = 197811101664.

The previous prime is 321443040283. The next prime is 321443040361. The reversal of 321443040321 is 123040344123.

321443040321 is a `hidden beast` number, since 3 + 214 + 43 + 0 + 403 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 75823680321 + 245619360000 = 275361^2 + 495600^2 .

It is not a de Polignac number, because 321443040321 - 2⁹ = 321443039809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (321443040361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1373688090 + ... + 1373688323.

It is an arithmetic number, because the mean of its divisors is an integer number (41668542279).

Almost surely, 2^321443040321 is an apocalyptic number.

It is an amenable number.

321443040321 is a deficient number, since it is larger than the sum of its proper divisors (178579467027).

321443040321 is a wasteful number, since it uses less digits than its factorization.

321443040321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747376432 (or 2747376429 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 321443040321 its reverse (123040344123), we get a palindrome (444483384444).

The spelling of 321443040321 in words is "three hundred twenty-one billion, four hundred forty-three million, forty thousand, three hundred twenty-one".