321043443013 has 4 divisors (see below), whose sum is σ = 322069141228. Its totient is φ = 320017744800.

The previous prime is 321043443001. The next prime is 321043443031. The reversal of 321043443013 is 310344340123.

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 124455845089 + 196587597924 = 352783^2 + 443382^2 .

It is a cyclic number.

It is not a de Polignac number, because 321043443013 - 2²¹ = 321041345861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321043443113) 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, 512848638 + ... + 512849263.

It is an arithmetic number, because the mean of its divisors is an integer number (80517285307).

Almost surely, 2^321043443013 is an apocalyptic number.

It is an amenable number.

321043443013 is a deficient number, since it is larger than the sum of its proper divisors (1025698215).

321043443013 is a wasteful number, since it uses less digits than its factorization.

321043443013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025698214.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 321043443013 its reverse (310344340123), we get a palindrome (631387783136).

The spelling of 321043443013 in words is "three hundred twenty-one billion, forty-three million, four hundred forty-three thousand, thirteen".