12123430436 has 24 divisors (see below), whose sum is σ = 23012391360. Its totient is φ = 5555171232.

The previous prime is 12123430409. The next prime is 12123430481. The reversal of 12123430436 is 63403432121.

12123430436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12123430399 and 12123430408.

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 7 ways as a sum of consecutive naturals, for example, 831416 + ... + 845871.

It is an arithmetic number, because the mean of its divisors is an integer number (958849640).

Almost surely, 2^12123430436 is an apocalyptic number.

It is an amenable number.

12123430436 is a deficient number, since it is larger than the sum of its proper divisors (10888960924).

12123430436 is a wasteful number, since it uses less digits than its factorization.

12123430436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677443 (or 1677441 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 12123430436 its reverse (63403432121), we get a palindrome (75526862557).

The spelling of 12123430436 in words is "twelve billion, one hundred twenty-three million, four hundred thirty thousand, four hundred thirty-six".