12221221102212 has 12 divisors (see below), whose sum is σ = 28516182571856. Its totient is φ = 4073740367400.

The previous prime is 12221221102199. The next prime is 12221221102219. The reversal of 12221221102212 is 21220112212221.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (12221221102219) 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, 509217545914 + ... + 509217545937.

Almost surely, 2^{12221221102212} is an apocalyptic number.

12221221102212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221221102212 is an abundant number, since it is smaller than the sum of its proper divisors (16294961469644).

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

12221221102212 is a wasteful number, since it uses less digits than its factorization.

12221221102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018435091858 (or 1018435091856 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221221102212 its reverse (21220112212221), we get a palindrome (33441333314433).

The spelling of 12221221102212 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, two hundred twelve".