12812128435 has 4 divisors (see below), whose sum is σ = 15374554128. Its totient is φ = 10249702744.

The previous prime is 12812128409. The next prime is 12812128463. The reversal of 12812128435 is 53482121821.

It is a happy number.

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-12812128435 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12812128394 and 12812128403.

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 3 ways as a sum of consecutive naturals, for example, 1281212839 + ... + 1281212848.

It is an arithmetic number, because the mean of its divisors is an integer number (3843638532).

Almost surely, 2^12812128435 is an apocalyptic number.

12812128435 is a deficient number, since it is larger than the sum of its proper divisors (2562425693).

12812128435 is an equidigital number, since it uses as much as digits as its factorization.

12812128435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562425692.

The product of its digits is 30720, while the sum is 37.

The spelling of 12812128435 in words is "twelve billion, eight hundred twelve million, one hundred twenty-eight thousand, four hundred thirty-five".