12103431205 has 16 divisors (see below), whose sum is σ = 15539184000. Its totient is φ = 9022743360.

The previous prime is 12103431161. The next prime is 12103431239. The reversal of 12103431205 is 50213430121.

It is a happy number.

12103431205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12103431205 - 2⁷ = 12103431077 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1038505 + ... + 1050094.

It is an arithmetic number, because the mean of its divisors is an integer number (971199000).

Almost surely, 2^12103431205 is an apocalyptic number.

It is an amenable number.

12103431205 is a deficient number, since it is larger than the sum of its proper divisors (3435752795).

12103431205 is a wasteful number, since it uses less digits than its factorization.

12103431205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088684.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 12103431205 its reverse (50213430121), we get a palindrome (62316861326).

The spelling of 12103431205 in words is "twelve billion, one hundred three million, four hundred thirty-one thousand, two hundred five".