321501324901 has 2 divisors, whose sum is σ = 321501324902. Its totient is φ = 321501324900.

The previous prime is 321501324899. The next prime is 321501324913. The reversal of 321501324901 is 109423105123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 250465216225 + 71036108676 = 500465^2 + 266526^2 .

It is an emirp because it is prime and its reverse (109423105123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321501324901 - 2¹ = 321501324899 is a prime.

Together with 321501324899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321501324101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160750662450 + 160750662451.

It is an arithmetic number, because the mean of its divisors is an integer number (160750662451).

Almost surely, 2^321501324901 is an apocalyptic number.

It is an amenable number.

321501324901 is a deficient number, since it is larger than the sum of its proper divisors (1).

321501324901 is an equidigital number, since it uses as much as digits as its factorization.

321501324901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 321501324901 in words is "three hundred twenty-one billion, five hundred one million, three hundred twenty-four thousand, nine hundred one".