12012120112109 has 4 divisors (see below), whose sum is σ = 12936129351516. Its totient is φ = 11088110872704.

The previous prime is 12012120112049. The next prime is 12012120112123. The reversal of 12012120112109 is 90121102121021.

It is a happy number.

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 4431993352900 + 7580126759209 = 2105230^2 + 2753203^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012120112109 - 2²⁰ = 12012119063533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012120112129) 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, 462004619684 + ... + 462004619709.

It is an arithmetic number, because the mean of its divisors is an integer number (3234032337879).

Almost surely, 2^{12012120112109} is an apocalyptic number.

It is an amenable number.

12012120112109 is a deficient number, since it is larger than the sum of its proper divisors (924009239407).

12012120112109 is an equidigital number, since it uses as much as digits as its factorization.

12012120112109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924009239406.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 12012120112109 in words is "twelve trillion, twelve billion, one hundred twenty million, one hundred twelve thousand, one hundred nine".