21113441224 has 16 divisors (see below), whose sum is σ = 40258681200. Its totient is φ = 10377792912.

The previous prime is 21113441203. The next prime is 21113441233. The reversal of 21113441224 is 42214431112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22365462 + ... + 22366405.

It is an arithmetic number, because the mean of its divisors is an integer number (2516167575).

Almost surely, 2^21113441224 is an apocalyptic number.

It is an amenable number.

21113441224 is a deficient number, since it is larger than the sum of its proper divisors (19145239976).

21113441224 is a wasteful number, since it uses less digits than its factorization.

21113441224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44731932 (or 44731928 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

Adding to 21113441224 its reverse (42214431112), we get a palindrome (63327872336).

The spelling of 21113441224 in words is "twenty-one billion, one hundred thirteen million, four hundred forty-one thousand, two hundred twenty-four".