17373072221 has 2 divisors, whose sum is σ = 17373072222. Its totient is φ = 17373072220.

The previous prime is 17373072193. The next prime is 17373072239. The reversal of 17373072221 is 12227037371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12187056025 + 5186016196 = 110395^2 + 72014^2 .

It is an emirp because it is prime and its reverse (12227037371) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17373072221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17373002221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8686536110 + 8686536111.

It is an arithmetic number, because the mean of its divisors is an integer number (8686536111).

Almost surely, 2^17373072221 is an apocalyptic number.

It is an amenable number.

17373072221 is a deficient number, since it is larger than the sum of its proper divisors (1).

17373072221 is an equidigital number, since it uses as much as digits as its factorization.

17373072221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 35.

The spelling of 17373072221 in words is "seventeen billion, three hundred seventy-three million, seventy-two thousand, two hundred twenty-one".