21113411324 has 24 divisors (see below), whose sum is σ = 39468135168. Its totient is φ = 9847792640.

The previous prime is 21113411251. The next prime is 21113411327. The reversal of 21113411324 is 42311431112.

It is a super-2 number, since 2×21113411324² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21113411324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113411327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1366172 + ... + 1381539.

It is an arithmetic number, because the mean of its divisors is an integer number (1644505632).

Almost surely, 2^21113411324 is an apocalyptic number.

It is an amenable number.

21113411324 is a deficient number, since it is larger than the sum of its proper divisors (18354723844).

21113411324 is a wasteful number, since it uses less digits than its factorization.

21113411324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747845 (or 2747843 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

Adding to 21113411324 its reverse (42311431112), we get a palindrome (63424842436).

The spelling of 21113411324 in words is "twenty-one billion, one hundred thirteen million, four hundred eleven thousand, three hundred twenty-four".