12129999632 has 20 divisors (see below), whose sum is σ = 23503741200. Its totient is φ = 6064518048.

The previous prime is 12129999631. The next prime is 12129999649. The reversal of 12129999632 is 23699992121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12129999631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265619 + ... + 307917.

It is an arithmetic number, because the mean of its divisors is an integer number (1175187060).

Almost surely, 2^12129999632 is an apocalyptic number.

It is an amenable number.

12129999632 is a deficient number, since it is larger than the sum of its proper divisors (11373741568).

12129999632 is a wasteful number, since it uses less digits than its factorization.

12129999632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60230 (or 60224 counting only the distinct ones).

The product of its digits is 944784, while the sum is 53.

The spelling of 12129999632 in words is "twelve billion, one hundred twenty-nine million, nine hundred ninety-nine thousand, six hundred thirty-two".