12212202221212 has 24 divisors (see below), whose sum is σ = 24426428178656. Its totient is φ = 5233367294208.

The previous prime is 12212202221183. The next prime is 12212202221239. The reversal of 12212202221212 is 21212220221221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17724993 + ... + 18401080.

Almost surely, 2^{12212202221212} is an apocalyptic number.

It is an amenable number.

12212202221212 is an abundant number, since it is smaller than the sum of its proper divisors (12214225957444).

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

12212202221212 is a wasteful number, since it uses less digits than its factorization.

12212202221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36138157 (or 36138155 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 12212202221212 its reverse (21212220221221), we get a palindrome (33424422442433).

Subtracting 12212202221212 from its reverse (21212220221221), we obtain a square (9000018000009 = 3000003²).

The spelling of 12212202221212 in words is "twelve trillion, two hundred twelve billion, two hundred two million, two hundred twenty-one thousand, two hundred twelve".