217611171011 has 4 divisors (see below), whose sum is σ = 234350491872. Its totient is φ = 200871850152.

The previous prime is 217611170999. The next prime is 217611171079. The reversal of 217611171011 is 110171116712.

217611171011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 217611171011 - 2²⁶ = 217544062147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217611171611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8369660411 + ... + 8369660436.

It is an arithmetic number, because the mean of its divisors is an integer number (58587622968).

Almost surely, 2^217611171011 is an apocalyptic number.

217611171011 is a deficient number, since it is larger than the sum of its proper divisors (16739320861).

217611171011 is a wasteful number, since it uses less digits than its factorization.

217611171011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16739320860.

The product of its (nonzero) digits is 588, while the sum is 29.

Adding to 217611171011 its reverse (110171116712), we get a palindrome (327782287723).

The spelling of 217611171011 in words is "two hundred seventeen billion, six hundred eleven million, one hundred seventy-one thousand, eleven".