12012112005 has 8 divisors (see below), whose sum is σ = 19219379232. Its totient is φ = 6406459728.

The previous prime is 12012111989. The next prime is 12012112027. The reversal of 12012112005 is 50021121021.

12012112005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12012112005 - 2⁴ = 12012111989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 800807467 = 12012112005 / (1 + 2 + 0 + 1 + 2 + 1 + 1 + 2 + 0 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400403719 + ... + 400403748.

It is an arithmetic number, because the mean of its divisors is an integer number (2402422404).

Almost surely, 2^12012112005 is an apocalyptic number.

12012112005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12012112005 is a deficient number, since it is larger than the sum of its proper divisors (7207267227).

12012112005 is an equidigital number, since it uses as much as digits as its factorization.

12012112005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800807475.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 12012112005 its reverse (50021121021), we get a palindrome (62033233026).

The spelling of 12012112005 in words is "twelve billion, twelve million, one hundred twelve thousand, five".