12800000001 has 4 divisors (see below), whose sum is σ = 17066666672. Its totient is φ = 8533333332.

The previous prime is 12799999981. The next prime is 12800000021. The reversal of 12800000001 is 10000000821.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (12799999981) and next prime (12800000021).

It is not a de Polignac number, because 12800000001 - 2²⁷ = 12665782273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12800000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133333331 + ... + 2133333336.

It is an arithmetic number, because the mean of its divisors is an integer number (4266666668).

Almost surely, 2^12800000001 is an apocalyptic number.

It is an amenable number.

12800000001 is a deficient number, since it is larger than the sum of its proper divisors (4266666671).

12800000001 is an equidigital number, since it uses as much as digits as its factorization.

12800000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266666670.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12800000001 its reverse (10000000821), we get a palindrome (22800000822).

The spelling of 12800000001 in words is "twelve billion, eight hundred million, one", and thus it is an aban number.