13128834217 has 4 divisors (see below), whose sum is σ = 13699653120. Its totient is φ = 12558015316.

The previous prime is 13128834203. The next prime is 13128834221. The reversal of 13128834217 is 71243882131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13128834217 - 2¹⁵ = 13128801449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13128834217.

It is not an unprimeable number, because it can be changed into a prime (13128834227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285409417 + ... + 285409462.

It is an arithmetic number, because the mean of its divisors is an integer number (3424913280).

Almost surely, 2^13128834217 is an apocalyptic number.

It is an amenable number.

13128834217 is a deficient number, since it is larger than the sum of its proper divisors (570818903).

13128834217 is an equidigital number, since it uses as much as digits as its factorization.

13128834217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570818902.

The product of its digits is 64512, while the sum is 40.

The spelling of 13128834217 in words is "thirteen billion, one hundred twenty-eight million, eight hundred thirty-four thousand, two hundred seventeen".