12000209911 has 16 divisors (see below), whose sum is σ = 12715176960. Its totient is φ = 11301776640.

The previous prime is 12000209909. The next prime is 12000209989. The reversal of 12000209911 is 11990200021.

It is a cyclic number.

It is not a de Polignac number, because 12000209911 - 2¹ = 12000209909 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 (12000200911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339495 + ... + 1348423.

It is an arithmetic number, because the mean of its divisors is an integer number (794698560).

Almost surely, 2^12000209911 is an apocalyptic number.

12000209911 is a deficient number, since it is larger than the sum of its proper divisors (714967049).

12000209911 is an equidigital number, since it uses as much as digits as its factorization.

12000209911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9846.

The product of its (nonzero) digits is 324, while the sum is 25.

Adding to 12000209911 its reverse (11990200021), we get a palindrome (23990409932).

The spelling of 12000209911 in words is "twelve billion, two hundred nine thousand, nine hundred eleven".