21333112124 has 18 divisors (see below), whose sum is σ = 38664686424. Its totient is φ = 10298742160.

The previous prime is 21333112109. The next prime is 21333112159. The reversal of 21333112124 is 42121133312.

It is a self number, because there is not a number n which added to its sum of digits gives 21333112124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3167432 + ... + 3174159.

Almost surely, 2^21333112124 is an apocalyptic number.

It is an amenable number.

21333112124 is a deficient number, since it is larger than the sum of its proper divisors (17331574300).

21333112124 is a wasteful number, since it uses less digits than its factorization.

21333112124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6341653 (or 6341622 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 21333112124 its reverse (42121133312), we get a palindrome (63454245436).

The spelling of 21333112124 in words is "twenty-one billion, three hundred thirty-three million, one hundred twelve thousand, one hundred twenty-four".