331221230222213 has 2 divisors, whose sum is σ = 331221230222214. Its totient is φ = 331221230222212.

The previous prime is 331221230222173. The next prime is 331221230222227. The reversal of 331221230222213 is 312222032122133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331080659966884 + 140570255329 = 18195622^2 + 374927^2 .

It is a cyclic number.

It is not a de Polignac number, because 331221230222213 - 2²⁴ = 331221213444997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331221230222273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165610615111106 + 165610615111107.

It is an arithmetic number, because the mean of its divisors is an integer number (165610615111107).

Almost surely, 2^{331221230222213} is an apocalyptic number.

It is an amenable number.

331221230222213 is a deficient number, since it is larger than the sum of its proper divisors (1).

331221230222213 is an equidigital number, since it uses as much as digits as its factorization.

331221230222213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 331221230222213 its reverse (312222032122133), we get a palindrome (643443262344346).

The spelling of 331221230222213 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty million, two hundred twenty-two thousand, two hundred thirteen".