321520541244241 has 2 divisors, whose sum is σ = 321520541244242. Its totient is φ = 321520541244240.

The previous prime is 321520541244209. The next prime is 321520541244283. The reversal of 321520541244241 is 142442145025123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243063534345025 + 78457006899216 = 15590495^2 + 8857596^2 .

It is an emirp because it is prime and its reverse (142442145025123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321520541244241 - 2⁵ = 321520541244209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321520541244194 and 321520541244203.

It is not a weakly prime, because it can be changed into another prime (321520541844241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160760270622120 + 160760270622121.

It is an arithmetic number, because the mean of its divisors is an integer number (160760270622121).

Almost surely, 2^{321520541244241} is an apocalyptic number.

It is an amenable number.

321520541244241 is a deficient number, since it is larger than the sum of its proper divisors (1).

321520541244241 is an equidigital number, since it uses as much as digits as its factorization.

321520541244241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 307200, while the sum is 40.

Adding to 321520541244241 its reverse (142442145025123), we get a palindrome (463962686269364).

The spelling of 321520541244241 in words is "three hundred twenty-one trillion, five hundred twenty billion, five hundred forty-one million, two hundred forty-four thousand, two hundred forty-one".