217133359321 has 2 divisors, whose sum is σ = 217133359322. Its totient is φ = 217133359320.

The previous prime is 217133359319. The next prime is 217133359411. The reversal of 217133359321 is 123953331712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216225000000 + 908359321 = 465000^2 + 30139^2 .

It is a cyclic number.

It is not a de Polignac number, because 217133359321 - 2¹ = 217133359319 is a prime.

Together with 217133359319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (217133359721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108566679660 + 108566679661.

It is an arithmetic number, because the mean of its divisors is an integer number (108566679661).

Almost surely, 2^217133359321 is an apocalyptic number.

It is an amenable number.

217133359321 is a deficient number, since it is larger than the sum of its proper divisors (1).

217133359321 is an equidigital number, since it uses as much as digits as its factorization.

217133359321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 40.

The spelling of 217133359321 in words is "two hundred seventeen billion, one hundred thirty-three million, three hundred fifty-nine thousand, three hundred twenty-one".