12166120156 has 24 divisors (see below), whose sum is σ = 21482756064. Its totient is φ = 6028431360.

The previous prime is 12166120151. The next prime is 12166120171. The reversal of 12166120156 is 65102166121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166120151) 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, 173076 + ... + 232996.

It is an arithmetic number, because the mean of its divisors is an integer number (895114836).

Almost surely, 2^12166120156 is an apocalyptic number.

It is an amenable number.

12166120156 is a deficient number, since it is larger than the sum of its proper divisors (9316635908).

12166120156 is a wasteful number, since it uses less digits than its factorization.

12166120156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60381 (or 60379 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 12166120156 its reverse (65102166121), we get a palindrome (77268286277).

The spelling of 12166120156 in words is "twelve billion, one hundred sixty-six million, one hundred twenty thousand, one hundred fifty-six".