21325124332 has 12 divisors (see below), whose sum is σ = 38186850856. Its totient is φ = 10414595520.

The previous prime is 21325124281. The next prime is 21325124351. The reversal of 21325124332 is 23342152312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21325124332.

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, 61991469 + ... + 61991812.

Almost surely, 2^21325124332 is an apocalyptic number.

It is an amenable number.

21325124332 is a deficient number, since it is larger than the sum of its proper divisors (16861726524).

21325124332 is a wasteful number, since it uses less digits than its factorization.

21325124332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123983328 (or 123983326 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

Adding to 21325124332 its reverse (23342152312), we get a palindrome (44667276644).

The spelling of 21325124332 in words is "twenty-one billion, three hundred twenty-five million, one hundred twenty-four thousand, three hundred thirty-two".