21033302112112 has 80 divisors (see below), whose sum is σ = 43087242240000. Its totient is φ = 9931743182592.

The previous prime is 21033302112029. The next prime is 21033302112187. The reversal of 21033302112112 is 21121120333012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3517393 + ... + 7378255.

It is an arithmetic number, because the mean of its divisors is an integer number (538590528000).

Almost surely, 2^{21033302112112} 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 21033302112112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21543621120000).

21033302112112 is an abundant number, since it is smaller than the sum of its proper divisors (22053940127888).

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

21033302112112 is a wasteful number, since it uses less digits than its factorization.

21033302112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861158 (or 3861152 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21033302112112 its reverse (21121120333012), we get a palindrome (42154422445124).

The spelling of 21033302112112 in words is "twenty-one trillion, thirty-three billion, three hundred two million, one hundred twelve thousand, one hundred twelve".