12111611665173 has 16 divisors (see below), whose sum is σ = 16427932503360. Its totient is φ = 7934939438976.

The previous prime is 12111611665171. The next prime is 12111611665271. The reversal of 12111611665173 is 37156611611121.

It is not a de Polignac number, because 12111611665173 - 2¹ = 12111611665171 is a prime.

It is a super-2 number, since 2×12111611665173² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111611665171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10728040 + ... + 11803137.

It is an arithmetic number, because the mean of its divisors is an integer number (1026745781460).

Almost surely, 2^{12111611665173} is an apocalyptic number.

It is an amenable number.

12111611665173 is a deficient number, since it is larger than the sum of its proper divisors (4316320838187).

12111611665173 is a wasteful number, since it uses less digits than its factorization.

12111611665173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22534276.

The product of its digits is 45360, while the sum is 42.

The spelling of 12111611665173 in words is "twelve trillion, one hundred eleven billion, six hundred eleven million, six hundred sixty-five thousand, one hundred seventy-three".