12109129803 has 16 divisors (see below), whose sum is σ = 17990868000. Its totient is φ = 8049615840.

The previous prime is 12109129787. The next prime is 12109129811. The reversal of 12109129803 is 30892190121.

It is not a de Polignac number, because 12109129803 - 2⁴ = 12109129787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12109129003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633108 + ... + 651953.

It is an arithmetic number, because the mean of its divisors is an integer number (1124429250).

Almost surely, 2^12109129803 is an apocalyptic number.

12109129803 is a deficient number, since it is larger than the sum of its proper divisors (5881738197).

12109129803 is a wasteful number, since it uses less digits than its factorization.

12109129803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285419 (or 1285413 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 12109129803 in words is "twelve billion, one hundred nine million, one hundred twenty-nine thousand, eight hundred three".