12111221120011 has 4 divisors (see below), whose sum is σ = 13042853513872. Its totient is φ = 11179588726152.

The previous prime is 12111221119997. The next prime is 12111221120083. The reversal of 12111221120011 is 11002112211121.

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 12111221120011 - 2⁵ = 12111221119979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111221220011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465816196911 + ... + 465816196936.

It is an arithmetic number, because the mean of its divisors is an integer number (3260713378468).

Almost surely, 2^{12111221120011} is an apocalyptic number.

12111221120011 is a deficient number, since it is larger than the sum of its proper divisors (931632393861).

12111221120011 is an equidigital number, since it uses as much as digits as its factorization.

12111221120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931632393860.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 12111221120011 its reverse (11002112211121), we get a palindrome (23113333331132).

The spelling of 12111221120011 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, eleven".