21112243113312 has 144 divisors (see below), whose sum is σ = 66159878632848. Its totient is φ = 6345003248640.

The previous prime is 21112243113277. The next prime is 21112243113331. The reversal of 21112243113312 is 21331134221112.

21112243113312 is a `hidden beast` number, since 2 + 1 + 1 + 12 + 2 + 4 + 311 + 331 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 65408239 + ... + 65730222.

It is an arithmetic number, because the mean of its divisors is an integer number (459443601617).

Almost surely, 2^{21112243113312} is an apocalyptic number.

It is an amenable number.

21112243113312 is an abundant number, since it is smaller than the sum of its proper divisors (45047635519536).

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

21112243113312 is a wasteful number, since it uses less digits than its factorization.

21112243113312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131138533 (or 131138522 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 21112243113312 its reverse (21331134221112), we get a palindrome (42443377334424).

The spelling of 21112243113312 in words is "twenty-one trillion, one hundred twelve billion, two hundred forty-three million, one hundred thirteen thousand, three hundred twelve".