21241330244 has 6 divisors (see below), whose sum is σ = 37172327934. Its totient is φ = 10620665120.

The previous prime is 21241330241. The next prime is 21241330249. The reversal of 21241330244 is 44203314212.

It can be written as a sum of positive squares in only one way, i.e., 11178832900 + 10062497344 = 105730^2 + 100312^2 .

It is a super-2 number, since 2×21241330244² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21241330241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2655166277 + ... + 2655166284.

It is an arithmetic number, because the mean of its divisors is an integer number (6195387989).

Almost surely, 2^21241330244 is an apocalyptic number.

It is an amenable number.

21241330244 is a deficient number, since it is larger than the sum of its proper divisors (15930997690).

21241330244 is a wasteful number, since it uses less digits than its factorization.

21241330244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5310332565 (or 5310332563 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21241330244 its reverse (44203314212), we get a palindrome (65444644456).

The spelling of 21241330244 in words is "twenty-one billion, two hundred forty-one million, three hundred thirty thousand, two hundred forty-four".