11171070217 has 4 divisors (see below), whose sum is σ = 11172433680. Its totient is φ = 11169706756.

The previous prime is 11171070203. The next prime is 11171070221. The reversal of 11171070217 is 71207017111.

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: 71207017111 = 8629 ⋅8252059.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11171070217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11171070517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669367 + ... + 685852.

It is an arithmetic number, because the mean of its divisors is an integer number (2793108420).

Almost surely, 2^11171070217 is an apocalyptic number.

It is an amenable number.

11171070217 is a deficient number, since it is larger than the sum of its proper divisors (1363463).

11171070217 is an equidigital number, since it uses as much as digits as its factorization.

11171070217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363462.

The product of its (nonzero) digits is 686, while the sum is 28.

Adding to 11171070217 its reverse (71207017111), we get a palindrome (82378087328).

The spelling of 11171070217 in words is "eleven billion, one hundred seventy-one million, seventy thousand, two hundred seventeen".