12131666650 has 24 divisors (see below), whose sum is σ = 23892248700. Its totient is φ = 4567215360.

The previous prime is 12131666621. The next prime is 12131666653. The reversal of 12131666650 is 5666613121.

12131666650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 4678970409 + 7452696241 = 68403^2 + 86329^2 .

It is not an unprimeable number, because it can be changed into a prime (12131666653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7135425 + ... + 7137124.

Almost surely, 2^12131666650 is an apocalyptic number.

12131666650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12131666650 is a deficient number, since it is larger than the sum of its proper divisors (11760582050).

12131666650 is a wasteful number, since it uses less digits than its factorization.

12131666650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14272578 (or 14272573 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 12131666650 in words is "twelve billion, one hundred thirty-one million, six hundred sixty-six thousand, six hundred fifty".