12111211212 has 12 divisors (see below), whose sum is σ = 28259492856. Its totient is φ = 4037070400.

The previous prime is 12111211201. The next prime is 12111211289. The reversal of 12111211212 is 21211211121.

It is a happy number.

12111211212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12111211191 and 12111211200.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 504633789 + ... + 504633812.

It is an arithmetic number, because the mean of its divisors is an integer number (2354957738).

Almost surely, 2^12111211212 is an apocalyptic number.

12111211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111211212 is an abundant number, since it is smaller than the sum of its proper divisors (16148281644).

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

12111211212 is a wasteful number, since it uses less digits than its factorization.

12111211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009267608 (or 1009267606 counting only the distinct ones).

The product of its digits is 16, while the sum is 15.

Adding to 12111211212 its reverse (21211211121), we get a palindrome (33322422333).

Subtracting 12111211212 from its reverse (21211211121), we obtain a palindrome (9099999909).

The spelling of 12111211212 in words is "twelve billion, one hundred eleven million, two hundred eleven thousand, two hundred twelve".