12120211212 has 48 divisors (see below), whose sum is σ = 29223194112. Its totient is φ = 3906740160.

The previous prime is 12120211189. The next prime is 12120211237. The reversal of 12120211212 is 21211202121.

It is a junction number, because it is equal to n+sod(n) for n = 12120211191 and 12120211200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11364 + ... + 156107.

It is an arithmetic number, because the mean of its divisors is an integer number (608816544).

Almost surely, 2^12120211212 is an apocalyptic number.

12120211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12120211212 is an abundant number, since it is smaller than the sum of its proper divisors (17102982900).

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

12120211212 is a wasteful number, since it uses less digits than its factorization.

12120211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167678 (or 167676 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12120211212 its reverse (21211202121), we get a palindrome (33331413333).

Subtracting 12120211212 from its reverse (21211202121), we obtain a palindrome (9090990909).

The spelling of 12120211212 in words is "twelve billion, one hundred twenty million, two hundred eleven thousand, two hundred twelve".