12111210011011 has 4 divisors (see below), whose sum is σ = 12111235923232. Its totient is φ = 12111184098792.

The previous prime is 12111210010987. The next prime is 12111210011053. The reversal of 12111210011011 is 11011001211121.

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 12111210011011 - 2¹⁷ = 12111209879939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12111210010982 and 12111210011000.

It is not an unprimeable number, because it can be changed into a prime (12111210011911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12241896 + ... + 13194181.

It is an arithmetic number, because the mean of its divisors is an integer number (3027808980808).

Almost surely, 2^{12111210011011} is an apocalyptic number.

12111210011011 is a deficient number, since it is larger than the sum of its proper divisors (25912221).

12111210011011 is an equidigital number, since it uses as much as digits as its factorization.

12111210011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25912220.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 12111210011011 its reverse (11011001211121), we get a palindrome (23122211222132).

The spelling of 12111210011011 in words is "twelve trillion, one hundred eleven billion, two hundred ten million, eleven thousand, eleven".