21244012104312 has 192 divisors, whose sum is σ = 61257963312000. Its totient is φ = 6640287021312.

The previous prime is 21244012104311. The next prime is 21244012104323. The reversal of 21244012104312 is 21340121044212.

21244012104312 is a `hidden beast` number, since 2 + 1 + 2 + 4 + 401 + 210 + 43 + 1 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244012104311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9186103 + ... + 11263769.

It is an arithmetic number, because the mean of its divisors is an integer number (319051892250).

Almost surely, 2^{21244012104312} 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 21244012104312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30628981656000).

21244012104312 is an abundant number, since it is smaller than the sum of its proper divisors (40013951207688).

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

21244012104312 is a wasteful number, since it uses less digits than its factorization.

21244012104312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077850 (or 2077843 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 21244012104312 its reverse (21340121044212), we get a palindrome (42584133148524).

The spelling of 21244012104312 in words is "twenty-one trillion, two hundred forty-four billion, twelve million, one hundred four thousand, three hundred twelve".