331221230222173 has 2 divisors, whose sum is σ = 331221230222174. Its totient is φ = 331221230222172.

The previous prime is 331221230222161. The next prime is 331221230222213. The reversal of 331221230222173 is 371222032122133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 282966159273604 + 48255070948569 = 16821598^2 + 6946587^2 .

It is an emirp because it is prime and its reverse (371222032122133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331221230222173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331221230222123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165610615111086 + 165610615111087.

It is an arithmetic number, because the mean of its divisors is an integer number (165610615111087).

Almost surely, 2^{331221230222173} is an apocalyptic number.

It is an amenable number.

331221230222173 is a deficient number, since it is larger than the sum of its proper divisors (1).

331221230222173 is an equidigital number, since it uses as much as digits as its factorization.

331221230222173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

The spelling of 331221230222173 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty million, two hundred twenty-two thousand, one hundred seventy-three".