12221000212 has 12 divisors (see below), whose sum is σ = 21582959860. Its totient is φ = 6054440256.

The previous prime is 12221000179. The next prime is 12221000219. The reversal of 12221000212 is 21200012221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5179105156 + 7041895056 = 71966^2 + 83916^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12221000192 and 12221000201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221000219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14014473 + ... + 14015344.

Almost surely, 2^12221000212 is an apocalyptic number.

It is an amenable number.

12221000212 is a deficient number, since it is larger than the sum of its proper divisors (9361959648).

12221000212 is a wasteful number, since it uses less digits than its factorization.

12221000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28029930 (or 28029928 counting only the distinct ones).

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

Adding to 12221000212 its reverse (21200012221), we get a palindrome (33421012433).

The spelling of 12221000212 in words is "twelve billion, two hundred twenty-one million, two hundred twelve", and thus it is an aban number.