12012111112 has 16 divisors (see below), whose sum is σ = 23299353900. Its totient is φ = 5798950080.

The previous prime is 12012111101. The next prime is 12012111119. The reversal of 12012111112 is 21111121021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11416067716 + 596043396 = 106846^2 + 24414^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12012111092 and 12012111101.

It is not an unprimeable number, because it can be changed into a prime (12012111119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25887939 + ... + 25888402.

Almost surely, 2^12012111112 is an apocalyptic number.

It is an amenable number.

12012111112 is a deficient number, since it is larger than the sum of its proper divisors (11287242788).

12012111112 is a wasteful number, since it uses less digits than its factorization.

12012111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51776376 (or 51776372 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12012111112 its reverse (21111121021), we get a palindrome (33123232133).

Subtracting 12012111112 from its reverse (21111121021), we obtain a palindrome (9099009909).

The spelling of 12012111112 in words is "twelve billion, twelve million, one hundred eleven thousand, one hundred twelve".