12128285451 has 4 divisors (see below), whose sum is σ = 16171047272. Its totient is φ = 8085523632.

The previous prime is 12128285441. The next prime is 12128285453. The reversal of 12128285451 is 15458282121.

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

It is not a de Polignac number, because 12128285451 - 2⁵ = 12128285419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12128285453) by changing a digit.

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, 2021380906 + ... + 2021380911.

It is an arithmetic number, because the mean of its divisors is an integer number (4042761818).

Almost surely, 2^12128285451 is an apocalyptic number.

12128285451 is a deficient number, since it is larger than the sum of its proper divisors (4042761821).

12128285451 is an equidigital number, since it uses as much as digits as its factorization.

12128285451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042761820.

The product of its digits is 51200, while the sum is 39.

The spelling of 12128285451 in words is "twelve billion, one hundred twenty-eight million, two hundred eighty-five thousand, four hundred fifty-one".