12113331212 has 48 divisors (see below), whose sum is σ = 22786239840. Its totient is φ = 5617631232.

The previous prime is 12113331203. The next prime is 12113331257. The reversal of 12113331212 is 21213331121.

It is a happy number.

It is a super-2 number, since 2×12113331212² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 752108 + ... + 768044.

It is an arithmetic number, because the mean of its divisors is an integer number (474713330).

Almost surely, 2^12113331212 is an apocalyptic number.

It is an amenable number.

12113331212 is a deficient number, since it is larger than the sum of its proper divisors (10672908628).

12113331212 is a wasteful number, since it uses less digits than its factorization.

12113331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16170 (or 16168 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 12113331212 its reverse (21213331121), we get a palindrome (33326662333).

Subtracting 12113331212 from its reverse (21213331121), we obtain a palindrome (9099999909).

The spelling of 12113331212 in words is "twelve billion, one hundred thirteen million, three hundred thirty-one thousand, two hundred twelve".