21041013244244 has 36 divisors (see below), whose sum is σ = 44310508198740. Its totient is φ = 8706626167680.

The previous prime is 21041013244231. The next prime is 21041013244267. The reversal of 21041013244244 is 44244231014012.

It can be written as a sum of positive squares in 2 ways, for example, as 4083188076100 + 16957825168144 = 2020690^2 + 4117988^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21041013244244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1850892737 + ... + 1850904104.

It is an arithmetic number, because the mean of its divisors is an integer number (1230847449965).

Almost surely, 2^{21041013244244} is an apocalyptic number.

It is an amenable number.

21041013244244 is an abundant number, since it is smaller than the sum of its proper divisors (23269494954496).

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

21041013244244 is a wasteful number, since it uses less digits than its factorization.

21041013244244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701796888 (or 3701796879 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 21041013244244 its reverse (44244231014012), we get a palindrome (65285244258256).

The spelling of 21041013244244 in words is "twenty-one trillion, forty-one billion, thirteen million, two hundred forty-four thousand, two hundred forty-four".