12126321966 has 16 divisors (see below), whose sum is σ = 26457429888. Its totient is φ = 3674643000.

The previous prime is 12126321937. The next prime is 12126321983. The reversal of 12126321966 is 66912362121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91866010 + ... + 91866141.

It is an arithmetic number, because the mean of its divisors is an integer number (1653589368).

Almost surely, 2^12126321966 is an apocalyptic number.

12126321966 is an abundant number, since it is smaller than the sum of its proper divisors (14331107922).

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

12126321966 is a wasteful number, since it uses less digits than its factorization.

12126321966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183732167.

The product of its digits is 46656, while the sum is 39.

The spelling of 12126321966 in words is "twelve billion, one hundred twenty-six million, three hundred twenty-one thousand, nine hundred sixty-six".