343213221233321 has 2 divisors, whose sum is σ = 343213221233322. Its totient is φ = 343213221233320.

The previous prime is 343213221233279. The next prime is 343213221233353. The reversal of 343213221233321 is 123332122312343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289774358017600 + 53438863215721 = 17022760^2 + 7310189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343213221233321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (343213221233621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171606610616660 + 171606610616661.

It is an arithmetic number, because the mean of its divisors is an integer number (171606610616661).

Almost surely, 2^{343213221233321} is an apocalyptic number.

It is an amenable number.

343213221233321 is a deficient number, since it is larger than the sum of its proper divisors (1).

343213221233321 is an equidigital number, since it uses as much as digits as its factorization.

343213221233321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 35.

Adding to 343213221233321 its reverse (123332122312343), we get a palindrome (466545343545664).

The spelling of 343213221233321 in words is "three hundred forty-three trillion, two hundred thirteen billion, two hundred twenty-one million, two hundred thirty-three thousand, three hundred twenty-one".