12123011166 has 32 divisors (see below), whose sum is σ = 28914513408. Its totient is φ = 3313120800.

The previous prime is 12123011081. The next prime is 12123011167. The reversal of 12123011166 is 66111032121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123011167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6273885 + ... + 6275816.

It is an arithmetic number, because the mean of its divisors is an integer number (903578544).

Almost surely, 2^12123011166 is an apocalyptic number.

12123011166 is an abundant number, since it is smaller than the sum of its proper divisors (16791502242).

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

12123011166 is a wasteful number, since it uses less digits than its factorization.

12123011166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12549736.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 12123011166 its reverse (66111032121), we get a palindrome (78234043287).

The spelling of 12123011166 in words is "twelve billion, one hundred twenty-three million, eleven thousand, one hundred sixty-six".