12221541016112 has 80 divisors (see below), whose sum is σ = 25094145538560. Its totient is φ = 5750037974016.

The previous prime is 12221541016067. The next prime is 12221541016129. The reversal of 12221541016112 is 21161014512221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66058328 + ... + 66243080.

It is an arithmetic number, because the mean of its divisors is an integer number (313676819232).

Almost surely, 2^{12221541016112} 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 12221541016112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12547072769280).

12221541016112 is an abundant number, since it is smaller than the sum of its proper divisors (12872604522448).

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

12221541016112 is a wasteful number, since it uses less digits than its factorization.

12221541016112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186250 (or 186244 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

Adding to 12221541016112 its reverse (21161014512221), we get a palindrome (33382555528333).

The spelling of 12221541016112 in words is "twelve trillion, two hundred twenty-one billion, five hundred forty-one million, sixteen thousand, one hundred twelve".