12278884109 has 4 divisors (see below), whose sum is σ = 12462151104. Its totient is φ = 12095617116.

The previous prime is 12278884097. The next prime is 12278884133. The reversal of 12278884109 is 90148887221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90148887221 = 211 ⋅427245911.

It is a cyclic number.

It is not a de Polignac number, because 12278884109 - 2²⁰ = 12277835533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278884169) 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, 91633397 + ... + 91633530.

It is an arithmetic number, because the mean of its divisors is an integer number (3115537776).

Almost surely, 2^12278884109 is an apocalyptic number.

It is an amenable number.

12278884109 is a deficient number, since it is larger than the sum of its proper divisors (183266995).

12278884109 is an equidigital number, since it uses as much as digits as its factorization.

12278884109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183266994.

The product of its (nonzero) digits is 516096, while the sum is 50.

The spelling of 12278884109 in words is "twelve billion, two hundred seventy-eight million, eight hundred eighty-four thousand, one hundred nine".