321213421334321 has 16 divisors (see below), whose sum is σ = 348405708006720. Its totient is φ = 294943152683520.

The previous prime is 321213421334291. The next prime is 321213421334383. The reversal of 321213421334321 is 123433124312123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321213421334321 - 2³⁰ = 321212347592497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321213421334621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125404190 + ... + 127939976.

It is an arithmetic number, because the mean of its divisors is an integer number (21775356750420).

Almost surely, 2^{321213421334321} is an apocalyptic number.

It is an amenable number.

321213421334321 is a deficient number, since it is larger than the sum of its proper divisors (27192286672399).

321213421334321 is a wasteful number, since it uses less digits than its factorization.

321213421334321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717584.

The product of its digits is 62208, while the sum is 35.

Adding to 321213421334321 its reverse (123433124312123), we get a palindrome (444646545646444).

The spelling of 321213421334321 in words is "three hundred twenty-one trillion, two hundred thirteen billion, four hundred twenty-one million, three hundred thirty-four thousand, three hundred twenty-one".