17123347321 has 4 divisors (see below), whose sum is σ = 17126008144. Its totient is φ = 17120686500.

The previous prime is 17123347309. The next prime is 17123347343. The reversal of 17123347321 is 12374332171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12374332171 = 601 ⋅20589571.

It is a cyclic number.

It is not a de Polignac number, because 17123347321 - 2⁵ = 17123347289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17123347361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320735 + ... + 1333636.

It is an arithmetic number, because the mean of its divisors is an integer number (4281502036).

Almost surely, 2^17123347321 is an apocalyptic number.

It is an amenable number.

17123347321 is a deficient number, since it is larger than the sum of its proper divisors (2660823).

17123347321 is an equidigital number, since it uses as much as digits as its factorization.

17123347321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660822.

The product of its digits is 21168, while the sum is 34.

Adding to 17123347321 its reverse (12374332171), we get a palindrome (29497679492).

The spelling of 17123347321 in words is "seventeen billion, one hundred twenty-three million, three hundred forty-seven thousand, three hundred twenty-one".