21113310324 has 12 divisors (see below), whose sum is σ = 49264390784. Its totient is φ = 7037770104.

The previous prime is 21113310247. The next prime is 21113310367. The reversal of 21113310324 is 42301331112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 21113310324.

It is a congruent number.

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, 879721252 + ... + 879721275.

Almost surely, 2^21113310324 is an apocalyptic number.

It is an amenable number.

21113310324 is an abundant number, since it is smaller than the sum of its proper divisors (28151080460).

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

21113310324 is a wasteful number, since it uses less digits than its factorization.

21113310324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759442534 (or 1759442532 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21113310324 its reverse (42301331112), we get a palindrome (63414641436).

The spelling of 21113310324 in words is "twenty-one billion, one hundred thirteen million, three hundred ten thousand, three hundred twenty-four".