12212121220012 has 12 divisors (see below), whose sum is σ = 24424242440080. Its totient is φ = 5233766237136.

The previous prime is 12212121219989. The next prime is 12212121220021. The reversal of 12212121220012 is 21002212121221.

12212121220012 is an admirable 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, 218073593187 + ... + 218073593242.

Almost surely, 2^{12212121220012} is an apocalyptic number.

It is an amenable number.

12212121220012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12212121220012 is a wasteful number, since it uses less digits than its factorization.

12212121220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436147186440 (or 436147186438 counting only the distinct ones).

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

Adding to 12212121220012 its reverse (21002212121221), we get a palindrome (33214333341233).

The spelling of 12212121220012 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, twelve".