321220004003413 has 4 divisors (see below), whose sum is σ = 321220082821228. Its totient is φ = 321219925185600.

The previous prime is 321220004003323. The next prime is 321220004003419. The reversal of 321220004003413 is 314300400022123.

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 108165782477284 + 213054221526129 = 10400278^2 + 14596377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321220004003413 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 (321220004003419) 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, 32941956 + ... + 41564557.

It is an arithmetic number, because the mean of its divisors is an integer number (80305020705307).

Almost surely, 2^{321220004003413} is an apocalyptic number.

It is an amenable number.

321220004003413 is a deficient number, since it is larger than the sum of its proper divisors (78817815).

321220004003413 is an equidigital number, since it uses as much as digits as its factorization.

321220004003413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78817814.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 321220004003413 its reverse (314300400022123), we get a palindrome (635520404025536).

The spelling of 321220004003413 in words is "three hundred twenty-one trillion, two hundred twenty billion, four million, three thousand, four hundred thirteen".