17311121 has 2 divisors, whose sum is σ = 17311122. Its totient is φ = 17311120.

The previous prime is 17311081. The next prime is 17311127. The reversal of 17311121 is 12111371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15249025 + 2062096 = 3905^2 + 1436^2 .

It is an emirp because it is prime and its reverse (12111371) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17311121 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17311121.

It is not a weakly prime, because it can be changed into another prime (17311127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8655560 + 8655561.

It is an arithmetic number, because the mean of its divisors is an integer number (8655561).

Almost surely, 2^17311121 is an apocalyptic number.

It is an amenable number.

17311121 is a deficient number, since it is larger than the sum of its proper divisors (1).

17311121 is an equidigital number, since it uses as much as digits as its factorization.

17311121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42, while the sum is 17.

The square root of 17311121 is about 4160.6635288136. The cubic root of 17311121 is about 258.6872738023.

Adding to 17311121 its reverse (12111371), we get a palindrome (29422492).

The spelling of 17311121 in words is "seventeen million, three hundred eleven thousand, one hundred twenty-one".