12111212000111 has 8 divisors (see below), whose sum is σ = 14123862391200. Its totient is φ = 10381038856944.

The previous prime is 12111212000099. The next prime is 12111212000171. The reversal of 12111212000111 is 11100021211121.

It is not a de Polignac number, because 12111212000111 - 2¹⁰ = 12111211999087 is a prime.

It is a super-2 number, since 2×12111212000111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111212000171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17654827646 + ... + 17654828331.

It is an arithmetic number, because the mean of its divisors is an integer number (1765482798900).

Almost surely, 2^{12111212000111} is an apocalyptic number.

12111212000111 is a deficient number, since it is larger than the sum of its proper divisors (2012650391089).

12111212000111 is an frugal number, since it uses more digits than its factorization.

12111212000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35309655998 (or 35309655984 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12111212000111 its reverse (11100021211121), we get a palindrome (23211233211232).

The spelling of 12111212000111 in words is "twelve trillion, one hundred eleven billion, two hundred twelve million, one hundred eleven", and thus it is an aban number.