17271185116921 has 4 divisors (see below), whose sum is σ = 17309651008500. Its totient is φ = 17232719225344.

The previous prime is 17271185116907. The next prime is 17271185116961. The reversal of 17271185116921 is 12961158117271.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14573497125625 + 2697687991296 = 3817525^2 + 1642464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17271185116921 is a prime.

It is a super-3 number, since 3×17271185116921³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17271185116961) 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, 19232945116 + ... + 19232946013.

It is an arithmetic number, because the mean of its divisors is an integer number (4327412752125).

Almost surely, 2^{17271185116921} is an apocalyptic number.

It is an amenable number.

17271185116921 is a deficient number, since it is larger than the sum of its proper divisors (38465891579).

17271185116921 is an equidigital number, since it uses as much as digits as its factorization.

17271185116921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38465891578.

The product of its digits is 423360, while the sum is 52.

The spelling of 17271185116921 in words is "seventeen trillion, two hundred seventy-one billion, one hundred eighty-five million, one hundred sixteen thousand, nine hundred twenty-one".