12000221212 has 24 divisors (see below), whose sum is σ = 24069231200. Its totient is φ = 5128211520.

The previous prime is 12000221203. The next prime is 12000221213. The reversal of 12000221212 is 21212200021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12000221192 and 12000221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000221213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604239 + ... + 623782.

Almost surely, 2^12000221212 is an apocalyptic number.

It is an amenable number.

12000221212 is an abundant number, since it is smaller than the sum of its proper divisors (12069009988).

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

12000221212 is a wasteful number, since it uses less digits than its factorization.

12000221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228381 (or 1228379 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12000221212 its reverse (21212200021), we get a palindrome (33212421233).

The spelling of 12000221212 in words is "twelve billion, two hundred twenty-one thousand, two hundred twelve".