12111101212 has 24 divisors (see below), whose sum is σ = 24322723040. Its totient is φ = 5168931840.

The previous prime is 12111101209. The next prime is 12111101213. The reversal of 12111101212 is 21210111121.

It is a happy number.

12111101212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12111101192 and 12111101201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111101213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890637 + ... + 904132.

Almost surely, 2^12111101212 is an apocalyptic number.

It is an amenable number.

12111101212 is an abundant number, since it is smaller than the sum of its proper divisors (12211621828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12111101212 is a wasteful number, since it uses less digits than its factorization.

12111101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795021 (or 1795019 counting only the distinct ones).

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

Adding to 12111101212 its reverse (21210111121), we get a palindrome (33321212333).

Subtracting 12111101212 from its reverse (21210111121), we obtain a palindrome (9099009909).

The spelling of 12111101212 in words is "twelve billion, one hundred eleven million, one hundred one thousand, two hundred twelve".