12011111122111 has 16 divisors (see below), whose sum is σ = 12761839733760. Its totient is φ = 11272245724800.

The previous prime is 12011111122093. The next prime is 12011111122183. The reversal of 12011111122111 is 11122111111021.

It is a cyclic number.

It is not a de Polignac number, because 12011111122111 - 2⁷ = 12011111121983 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 (12011111129111) 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, 81960375 + ... + 82106791.

It is an arithmetic number, because the mean of its divisors is an integer number (797614983360).

Almost surely, 2^{12011111122111} is an apocalyptic number.

12011111122111 is a deficient number, since it is larger than the sum of its proper divisors (750728611649).

12011111122111 is a wasteful number, since it uses less digits than its factorization.

12011111122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186894.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 12011111122111 its reverse (11122111111021), we get a palindrome (23133222233132).

The spelling of 12011111122111 in words is "twelve trillion, eleven billion, one hundred eleven million, one hundred twenty-two thousand, one hundred eleven".