12212102100220 has 96 divisors (see below), whose sum is σ = 28229959296000. Its totient is φ = 4400721273600.

The previous prime is 12212102100179. The next prime is 12212102100229. The reversal of 12212102100220 is 2200120121221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12212102100194 and 12212102100203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212102100229) 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 31 ways as a sum of consecutive naturals, for example, 13695991 + ... + 14560369.

It is an arithmetic number, because the mean of its divisors is an integer number (294062076000).

Almost surely, 2^{12212102100220} is an apocalyptic number.

12212102100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12212102100220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14114979648000).

12212102100220 is an abundant number, since it is smaller than the sum of its proper divisors (16017857195780).

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

12212102100220 is a wasteful number, since it uses less digits than its factorization.

12212102100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864979 (or 864977 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12212102100220 its reverse (2200120121221), we get a palindrome (14412222221441).

The spelling of 12212102100220 in words is "twelve trillion, two hundred twelve billion, one hundred two million, one hundred thousand, two hundred twenty".