12102121110111 has 16 divisors (see below), whose sum is σ = 16495752259584. Its totient is φ = 7888624271264.

The previous prime is 12102121110049. The next prime is 12102121110119. The reversal of 12102121110111 is 11101112120121.

It is a cyclic number.

It is not a de Polignac number, because 12102121110111 - 2¹⁹ = 12102120585823 is a prime.

It is a super-2 number, since 2×12102121110111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102121110119) 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 15 ways as a sum of consecutive naturals, for example, 42221751 + ... + 42507416.

It is an arithmetic number, because the mean of its divisors is an integer number (1030984516224).

Almost surely, 2^{12102121110111} is an apocalyptic number.

12102121110111 is a deficient number, since it is larger than the sum of its proper divisors (4393631149473).

12102121110111 is a wasteful number, since it uses less digits than its factorization.

12102121110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84730230.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12102121110111 its reverse (11101112120121), we get a palindrome (23203233230232).

The spelling of 12102121110111 in words is "twelve trillion, one hundred two billion, one hundred twenty-one million, one hundred ten thousand, one hundred eleven".