21224033210 has 16 divisors (see below), whose sum is σ = 38211561000. Its totient is φ = 8487768576.

The previous prime is 21224033183. The next prime is 21224033261. The reversal of 21224033210 is 1233042212.

It can be written as a sum of positive squares in 4 ways, for example, as 20689082569 + 534950641 = 143837^2 + 23129^2 .

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 7 ways as a sum of consecutive naturals, for example, 181775 + ... + 274754.

Almost surely, 2^21224033210 is an apocalyptic number.

21224033210 is a deficient number, since it is larger than the sum of its proper divisors (16987527790).

21224033210 is a wasteful number, since it uses less digits than its factorization.

21224033210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461185.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21224033210 its reverse (1233042212), we get a palindrome (22457075422).

The spelling of 21224033210 in words is "twenty-one billion, two hundred twenty-four million, thirty-three thousand, two hundred ten".