21232143224 has 16 divisors (see below), whose sum is σ = 39897387600. Its totient is φ = 10592839872.

The previous prime is 21232143211. The next prime is 21232143271. The reversal of 21232143224 is 42234123212.

It is a super-2 number, since 2×21232143224² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21232143193 and 21232143202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2900084 + ... + 2907395.

It is an arithmetic number, because the mean of its divisors is an integer number (2493586725).

Almost surely, 2^21232143224 is an apocalyptic number.

It is an amenable number.

21232143224 is a deficient number, since it is larger than the sum of its proper divisors (18665244376).

21232143224 is a wasteful number, since it uses less digits than its factorization.

21232143224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5807942 (or 5807938 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

Adding to 21232143224 its reverse (42234123212), we get a palindrome (63466266436).

The spelling of 21232143224 in words is "twenty-one billion, two hundred thirty-two million, one hundred forty-three thousand, two hundred twenty-four".