12012111011 has 8 divisors (see below), whose sum is σ = 12767089920. Its totient is φ = 11269408392.

The previous prime is 12012110993. The next prime is 12012111019. The reversal of 12012111011 is 11011121021.

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

It is a cyclic number.

It is not a de Polignac number, because 12012111011 - 2⁶ = 12012110947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012110983 and 12012111001.

It is not an unprimeable number, because it can be changed into a prime (12012111019) 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, 3067055 + ... + 3070968.

It is an arithmetic number, because the mean of its divisors is an integer number (1595886240).

Almost surely, 2^12012111011 is an apocalyptic number.

12012111011 is a deficient number, since it is larger than the sum of its proper divisors (754978909).

12012111011 is a wasteful number, since it uses less digits than its factorization.

12012111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6138145.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12012111011 its reverse (11011121021), we get a palindrome (23023232032).

The spelling of 12012111011 in words is "twelve billion, twelve million, one hundred eleven thousand, eleven".