12129401435 has 4 divisors (see below), whose sum is σ = 14555281728. Its totient is φ = 9703521144.

The previous prime is 12129401413. The next prime is 12129401441. The reversal of 12129401435 is 53410492121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12129401435 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212940139 + ... + 1212940148.

It is an arithmetic number, because the mean of its divisors is an integer number (3638820432).

Almost surely, 2^12129401435 is an apocalyptic number.

12129401435 is a deficient number, since it is larger than the sum of its proper divisors (2425880293).

12129401435 is an equidigital number, since it uses as much as digits as its factorization.

12129401435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425880292.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 12129401435 its reverse (53410492121), we get a palindrome (65539893556).

The spelling of 12129401435 in words is "twelve billion, one hundred twenty-nine million, four hundred one thousand, four hundred thirty-five".