21110526224256 has 256 divisors, whose sum is σ = 68133596912640. Its totient is φ = 5660480077824.

The previous prime is 21110526224243. The next prime is 21110526224299. The reversal of 21110526224256 is 65242262501112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55336 + ... + 6498008.

It is an arithmetic number, because the mean of its divisors is an integer number (266146862940).

Almost surely, 2^{21110526224256} 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 21110526224256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34066798456320).

21110526224256 is an abundant number, since it is smaller than the sum of its proper divisors (47023070688384).

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

21110526224256 is a wasteful number, since it uses less digits than its factorization.

21110526224256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6442773 (or 6442761 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 21110526224256 its reverse (65242262501112), we get a palindrome (86352788725368).

The spelling of 21110526224256 in words is "twenty-one trillion, one hundred ten billion, five hundred twenty-six million, two hundred twenty-four thousand, two hundred fifty-six".