12122110121111 has 16 divisors (see below), whose sum is σ = 12413590695936. Its totient is φ = 11834088590016.

The previous prime is 12122110121101. The next prime is 12122110121141. The reversal of 12122110121111 is 11112101122121.

It is a cyclic number.

It is not a de Polignac number, because 12122110121111 - 2¹⁸ = 12122109858967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12122110121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122110121101) 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 15 ways as a sum of consecutive naturals, for example, 6932315 + ... + 8503011.

It is an arithmetic number, because the mean of its divisors is an integer number (775849418496).

Almost surely, 2^{12122110121111} is an apocalyptic number.

12122110121111 is a deficient number, since it is larger than the sum of its proper divisors (291480574825).

12122110121111 is a wasteful number, since it uses less digits than its factorization.

12122110121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571798.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12122110121111 its reverse (11112101122121), we get a palindrome (23234211243232).

The spelling of 12122110121111 in words is "twelve trillion, one hundred twenty-two billion, one hundred ten million, one hundred twenty-one thousand, one hundred eleven".