12012111012209 has 48 divisors (see below), whose sum is σ = 16080678641664. Its totient is φ = 8762633505120.

The previous prime is 12012111012137. The next prime is 12012111012221. The reversal of 12012111012209 is 90221011121021.

It is a happy number.

It is not a de Polignac number, because 12012111012209 - 2²⁸ = 12011842576753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (12012111012289) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5644037 + ... + 7475250.

It is an arithmetic number, because the mean of its divisors is an integer number (335014138368).

Almost surely, 2^{12012111012209} is an apocalyptic number.

It is an amenable number.

12012111012209 is a deficient number, since it is larger than the sum of its proper divisors (4068567629455).

12012111012209 is a wasteful number, since it uses less digits than its factorization.

12012111012209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13119386 (or 13119375 counting only the distinct ones).

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

The spelling of 12012111012209 in words is "twelve trillion, twelve billion, one hundred eleven million, twelve thousand, two hundred nine".