12211221112212 has 24 divisors (see below), whose sum is σ = 28504806042496. Its totient is φ = 4068698925888.

The previous prime is 12211221112141. The next prime is 12211221112217. The reversal of 12211221112212 is 21221112211221.

It is a super-2 number, since 2×12211221112212² (a number of 27 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211221112217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213484153 + ... + 213541344.

Almost surely, 2^{12211221112212} is an apocalyptic number.

12211221112212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12211221112212 is an abundant number, since it is smaller than the sum of its proper divisors (16293584930284).

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

12211221112212 is a wasteful number, since it uses less digits than its factorization.

12211221112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427027887 (or 427027885 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

Adding to 12211221112212 its reverse (21221112211221), we get a palindrome (33432333323433).

The spelling of 12211221112212 in words is "twelve trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, two hundred twelve".