12111611665170 has 64 divisors (see below), whose sum is σ = 30984304809600. Its totient is φ = 3019375838208.

The previous prime is 12111611665157. The next prime is 12111611665171. The reversal of 12111611665170 is 7156611611121.

It is a happy number.

12111611665170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×12111611665170³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79616152 + ... + 79768131.

It is an arithmetic number, because the mean of its divisors is an integer number (484129762650).

Almost surely, 2^{12111611665170} is an apocalyptic number.

12111611665170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111611665170 is an abundant number, since it is smaller than the sum of its proper divisors (18872693144430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111611665170 is a wasteful number, since it uses less digits than its factorization.

12111611665170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159384459.

The product of its (nonzero) digits is 15120, while the sum is 39.

The spelling of 12111611665170 in words is "twelve trillion, one hundred eleven billion, six hundred eleven million, six hundred sixty-five thousand, one hundred seventy".