12111212011112 has 16 divisors (see below), whose sum is σ = 22860928714500. Its totient is φ = 6014964353920.

The previous prime is 12111212011097. The next prime is 12111212011153. The reversal of 12111212011112 is 21111021211121.

It can be written as a sum of positive squares in 2 ways, for example, as 12093047980036 + 18164031076 = 3477506^2 + 134774^2 .

It is a super-2 number, since 2×12111212011112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5080205189 + ... + 5080207572.

Almost surely, 2^{12111212011112} is an apocalyptic number.

It is an amenable number.

12111212011112 is a deficient number, since it is larger than the sum of its proper divisors (10749716703388).

12111212011112 is a wasteful number, since it uses less digits than its factorization.

12111212011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10160412916 (or 10160412912 counting only the distinct ones).

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

Adding to 12111212011112 its reverse (21111021211121), we get a palindrome (33222233222233).

The spelling of 12111212011112 in words is "twelve trillion, one hundred eleven billion, two hundred twelve million, eleven thousand, one hundred twelve".