21330330124 has 24 divisors (see below), whose sum is σ = 37601121600. Its totient is φ = 10587425616.

The previous prime is 21330330113. The next prime is 21330330139. The reversal of 21330330124 is 42103303312.

It is a junction number, because it is equal to n+sod(n) for n = 21330330095 and 21330330104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281227 + ... + 348925.

It is an arithmetic number, because the mean of its divisors is an integer number (1566713400).

Almost surely, 2^21330330124 is an apocalyptic number.

It is an amenable number.

21330330124 is a deficient number, since it is larger than the sum of its proper divisors (16270791476).

21330330124 is a wasteful number, since it uses less digits than its factorization.

21330330124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68277 (or 68275 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21330330124 its reverse (42103303312), we get a palindrome (63433633436).

The spelling of 21330330124 in words is "twenty-one billion, three hundred thirty million, three hundred thirty thousand, one hundred twenty-four".