12821212 has 12 divisors (see below), whose sum is σ = 23412816. Its totient is φ = 6131840.

The previous prime is 12821153. The next prime is 12821227. The reversal of 12821212 is 21212821.

12821212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12821212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69589 + ... + 69772.

It is an arithmetic number, because the mean of its divisors is an integer number (1951068).

Almost surely, 2^12821212 is an apocalyptic number.

It is an amenable number.

12821212 is a deficient number, since it is larger than the sum of its proper divisors (10591604).

12821212 is a wasteful number, since it uses less digits than its factorization.

12821212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139388 (or 139386 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

The square root of 12821212 is about 3580.6720039680. The cubic root of 12821212 is about 234.0505649608.

The spelling of 12821212 in words is "twelve million, eight hundred twenty-one thousand, two hundred twelve".