21322124 has 6 divisors (see below), whose sum is σ = 37313724. Its totient is φ = 10661060.

The previous prime is 21322117. The next prime is 21322129. The reversal of 21322124 is 42122312.

It is not an unprimeable number, because it can be changed into a prime (21322129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2665262 + ... + 2665269.

It is an arithmetic number, because the mean of its divisors is an integer number (6218954).

Almost surely, 2^21322124 is an apocalyptic number.

It is an amenable number.

21322124 is a deficient number, since it is larger than the sum of its proper divisors (15991600).

21322124 is a wasteful number, since it uses less digits than its factorization.

21322124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330535 (or 5330533 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 21322124 is about 4617.5885481493. The cubic root of 21322124 is about 277.2959254947.

Adding to 21322124 its reverse (42122312), we get a palindrome (63444436).

The spelling of 21322124 in words is "twenty-one million, three hundred twenty-two thousand, one hundred twenty-four".