12120021212 has 48 divisors (see below), whose sum is σ = 23897825280. Its totient is φ = 5336472768.

The previous prime is 12120021209. The next prime is 12120021223. The reversal of 12120021212 is 21212002121.

12120021212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 444839 + ... + 471297.

It is an arithmetic number, because the mean of its divisors is an integer number (497871360).

Almost surely, 2^12120021212 is an apocalyptic number.

It is an amenable number.

12120021212 is a deficient number, since it is larger than the sum of its proper divisors (11777804068).

12120021212 is a wasteful number, since it uses less digits than its factorization.

12120021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26882 (or 26880 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12120021212 its reverse (21212002121), we get a palindrome (33332023333).

It can be divided in two parts, 1212002121 and 2, that multiplied together give a palindrome (2424004242).

The spelling of 12120021212 in words is "twelve billion, one hundred twenty million, twenty-one thousand, two hundred twelve".