12000021212 has 24 divisors (see below), whose sum is σ = 21213566976. Its totient is φ = 5939217648.

The previous prime is 12000021181. The next prime is 12000021233. The reversal of 12000021212 is 21212000021.

It is a happy number.

12000021212 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 = 12000021193 and 12000021202.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 198383 + ... + 251705.

It is an arithmetic number, because the mean of its divisors is an integer number (883898624).

Almost surely, 2^12000021212 is an apocalyptic number.

It is an amenable number.

12000021212 is a deficient number, since it is larger than the sum of its proper divisors (9213545764).

12000021212 is a wasteful number, since it uses less digits than its factorization.

12000021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53897 (or 53895 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12000021212 its reverse (21212000021), we get a palindrome (33212021233).

It can be divided in two parts, 12000021 and 212, that multiplied together give a palindrome (2544004452).

The spelling of 12000021212 in words is "twelve billion, twenty-one thousand, two hundred twelve".