12220000221212 has 96 divisors (see below), whose sum is σ = 25890402263040. Its totient is φ = 4933423535040.

The previous prime is 12220000221211. The next prime is 12220000221223. The reversal of 12220000221212 is 21212200002221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220000221211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41324339 + ... + 41618997.

It is an arithmetic number, because the mean of its divisors is an integer number (269691690240).

Almost surely, 2^{12220000221212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12220000221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12945201131520).

12220000221212 is an abundant number, since it is smaller than the sum of its proper divisors (13670402041828).

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

12220000221212 is a wasteful number, since it uses less digits than its factorization.

12220000221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295671 (or 295669 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12220000221212 its reverse (21212200002221), we get a palindrome (33432200223433).

The spelling of 12220000221212 in words is "twelve trillion, two hundred twenty billion, two hundred twenty-one thousand, two hundred twelve".