12128834105 has 4 divisors (see below), whose sum is σ = 14554600932. Its totient is φ = 9703067280.

The previous prime is 12128834077. The next prime is 12128834117. The reversal of 12128834105 is 50143882121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4280823184 + 7848010921 = 65428^2 + 88589^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12128834105 is a prime.

It is a super-2 number, since 2×12128834105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 1212883406 + ... + 1212883415.

It is an arithmetic number, because the mean of its divisors is an integer number (3638650233).

Almost surely, 2^12128834105 is an apocalyptic number.

It is an amenable number.

12128834105 is a deficient number, since it is larger than the sum of its proper divisors (2425766827).

12128834105 is an equidigital number, since it uses as much as digits as its factorization.

12128834105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425766826.

The product of its (nonzero) digits is 15360, while the sum is 35.

The spelling of 12128834105 in words is "twelve billion, one hundred twenty-eight million, eight hundred thirty-four thousand, one hundred five".