12111212122170 has 96 divisors (see below), whose sum is σ = 33840044179200. Its totient is φ = 2766024180864.

The previous prime is 12111212122157. The next prime is 12111212122171. The reversal of 12111212122170 is 7122121211121.

12111212122170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12111212122170.

It is not an unprimeable number, because it can be changed into a prime (12111212122171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1545250 + ... + 5158509.

It is an arithmetic number, because the mean of its divisors is an integer number (352500460200).

Almost surely, 2^{12111212122170} is an apocalyptic number.

12111212122170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111212122170 is an abundant number, since it is smaller than the sum of its proper divisors (21728832057030).

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

12111212122170 is a wasteful number, since it uses less digits than its factorization.

12111212122170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6705012 (or 6705005 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 24.

Adding to 12111212122170 its reverse (7122121211121), we get a palindrome (19233333333291).

The spelling of 12111212122170 in words is "twelve trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, one hundred seventy".