12012012209 has 8 divisors (see below), whose sum is σ = 12123145320. Its totient is φ = 11900964096.

The previous prime is 12012012191. The next prime is 12012012217. The reversal of 12012012209 is 90221021021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3139984 + 12008872225 = 1772^2 + 109585^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012012209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012012409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282647 + ... + 322355.

It is an arithmetic number, because the mean of its divisors is an integer number (1515393165).

Almost surely, 2^12012012209 is an apocalyptic number.

It is an amenable number.

12012012209 is a deficient number, since it is larger than the sum of its proper divisors (111133111).

12012012209 is a wasteful number, since it uses less digits than its factorization.

12012012209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42499.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 12012012209 in words is "twelve billion, twelve million, twelve thousand, two hundred nine".