12201221221112 has 128 divisors (see below), whose sum is σ = 28898725363200. Its totient is φ = 4691338560000.

The previous prime is 12201221221097. The next prime is 12201221221151. The reversal of 12201221221112 is 21112212210221.

It is a congruent number.

It is an unprimeable number.

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, 16491158 + ... + 17215130.

It is an arithmetic number, because the mean of its divisors is an integer number (225771291900).

Almost surely, 2^{12201221221112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12201221221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14449362681600).

12201221221112 is an abundant number, since it is smaller than the sum of its proper divisors (16697504142088).

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

12201221221112 is a wasteful number, since it uses less digits than its factorization.

12201221221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724357 (or 724353 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12201221221112 its reverse (21112212210221), we get a palindrome (33313433431333).

The spelling of 12201221221112 in words is "twelve trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".