12127197144 has 64 divisors (see below), whose sum is σ = 30607632000. Its totient is φ = 4003900160.

The previous prime is 12127197139. The next prime is 12127197157. The reversal of 12127197144 is 44179172121.

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 15 ways as a sum of consecutive naturals, for example, 1785547 + ... + 1792325.

It is an arithmetic number, because the mean of its divisors is an integer number (478244250).

Almost surely, 2^12127197144 is an apocalyptic number.

It is an amenable number.

12127197144 is an abundant number, since it is smaller than the sum of its proper divisors (18480434856).

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

12127197144 is a wasteful number, since it uses less digits than its factorization.

12127197144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7488 (or 7484 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The spelling of 12127197144 in words is "twelve billion, one hundred twenty-seven million, one hundred ninety-seven thousand, one hundred forty-four".