17121112116661 has 8 divisors (see below), whose sum is σ = 19591112268224. Its totient is φ = 14657143713120.

The previous prime is 17121112116659. The next prime is 17121112116811. The reversal of 17121112116661 is 16661121112171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17121112116661 - 2¹ = 17121112116659 is a prime.

It is a super-2 number, since 2×17121112116661² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17121112116661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17121112116061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1507930920 + ... + 1507942273.

It is an arithmetic number, because the mean of its divisors is an integer number (2448889033528).

Almost surely, 2^{17121112116661} is an apocalyptic number.

It is an amenable number.

17121112116661 is a deficient number, since it is larger than the sum of its proper divisors (2470000151563).

17121112116661 is an equidigital number, since it uses as much as digits as its factorization.

17121112116661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015874011.

The product of its digits is 6048, while the sum is 37.

The spelling of 17121112116661 in words is "seventeen trillion, one hundred twenty-one billion, one hundred twelve million, one hundred sixteen thousand, six hundred sixty-one".