12111611665174 has 16 divisors (see below), whose sum is σ = 20762815543200. Its totient is φ = 5190677541504.

The previous prime is 12111611665171. The next prime is 12111611665271. The reversal of 12111611665174 is 47156611611121.

It is a super-2 number, since 2×12111611665174² (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 12111611665174.

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 7 ways as a sum of consecutive naturals, for example, 6366472 + ... + 8047060.

It is an arithmetic number, because the mean of its divisors is an integer number (1297675971450).

Almost surely, 2^{12111611665174} is an apocalyptic number.

12111611665174 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12111611665174 is a deficient number, since it is larger than the sum of its proper divisors (8651203878026).

12111611665174 is a wasteful number, since it uses less digits than its factorization.

12111611665174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195367.

The product of its digits is 60480, while the sum is 43.

The spelling of 12111611665174 in words is "twelve trillion, one hundred eleven billion, six hundred eleven million, six hundred sixty-five thousand, one hundred seventy-four".