12126705136 has 80 divisors (see below), whose sum is σ = 29622979008. Its totient is φ = 4680345600.

The previous prime is 12126705091. The next prime is 12126705161. The reversal of 12126705136 is 63150762121.

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, 41875 + ... + 161266.

Almost surely, 2^12126705136 is an apocalyptic number.

12126705136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12126705136 is an abundant number, since it is smaller than the sum of its proper divisors (17496273872).

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

12126705136 is a wasteful number, since it uses less digits than its factorization.

12126705136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203210 (or 203204 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 12126705136 in words is "twelve billion, one hundred twenty-six million, seven hundred five thousand, one hundred thirty-six".