21111043324 has 12 divisors (see below), whose sum is σ = 42222086704. Its totient is φ = 9047589984.

The previous prime is 21111043313. The next prime is 21111043351. The reversal of 21111043324 is 42334011112.

21111043324 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21111043295 and 21111043304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376982889 + ... + 376982944.

Almost surely, 2^21111043324 is an apocalyptic number.

It is an amenable number.

21111043324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21111043324 is a wasteful number, since it uses less digits than its factorization.

21111043324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753965844 (or 753965842 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21111043324 its reverse (42334011112), we get a palindrome (63445054436).

The spelling of 21111043324 in words is "twenty-one billion, one hundred eleven million, forty-three thousand, three hundred twenty-four".