321034034130521 has 4 divisors (see below), whose sum is σ = 332104173238500. Its totient is φ = 309963895022544.

The previous prime is 321034034130503. The next prime is 321034034130529. The reversal of 321034034130521 is 125031430430123.

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 234535012895296 + 86499021235225 = 15314536^2 + 9300485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321034034130521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321034034130529) 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, 5535069553946 + ... + 5535069554003.

It is an arithmetic number, because the mean of its divisors is an integer number (83026043309625).

Almost surely, 2^{321034034130521} is an apocalyptic number.

It is an amenable number.

321034034130521 is a deficient number, since it is larger than the sum of its proper divisors (11070139107979).

321034034130521 is a wasteful number, since it uses less digits than its factorization.

321034034130521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11070139107978.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 321034034130521 its reverse (125031430430123), we get a palindrome (446065464560644).

The spelling of 321034034130521 in words is "three hundred twenty-one trillion, thirty-four billion, thirty-four million, one hundred thirty thousand, five hundred twenty-one".