12000011011 has 4 divisors (see below), whose sum is σ = 12001614912. Its totient is φ = 11998407112.

The previous prime is 12000010991. The next prime is 12000011027. The reversal of 12000011011 is 11011000021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12000011011 - 2⁹ = 12000010499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12000010985 and 12000011003.

It is not an unprimeable number, because it can be changed into a prime (12000011041) 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, 790675 + ... + 805708.

It is an arithmetic number, because the mean of its divisors is an integer number (3000403728).

Almost surely, 2^12000011011 is an apocalyptic number.

12000011011 is a deficient number, since it is larger than the sum of its proper divisors (1603901).

12000011011 is an equidigital number, since it uses as much as digits as its factorization.

12000011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603900.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 12000011011 its reverse (11011000021), we get a palindrome (23011011032).

The spelling of 12000011011 in words is "twelve billion, eleven thousand, eleven".