12212012 has 12 divisors (see below), whose sum is σ = 21418320. Its totient is φ = 6092496.

The previous prime is 12211981. The next prime is 12212021. The reversal of 12212012 is 21021221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12211984 and 12212002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187 + ... + 5082.

It is an arithmetic number, because the mean of its divisors is an integer number (1784860).

Almost surely, 2^12212012 is an apocalyptic number.

It is an amenable number.

12212012 is a deficient number, since it is larger than the sum of its proper divisors (9206308).

12212012 is a wasteful number, since it uses less digits than its factorization.

12212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6760 (or 6758 counting only the distinct ones).

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

The square root of 12212012 is about 3494.5689290669. The cubic root of 12212012 is about 230.2832804428.

Adding to 12212012 its reverse (21021221), we get a palindrome (33233233).

The spelling of 12212012 in words is "twelve million, two hundred twelve thousand, twelve".