21110232224 has 12 divisors (see below), whose sum is σ = 41560769754. Its totient is φ = 10555116096.

The previous prime is 21110232217. The next prime is 21110232263. The reversal of 21110232224 is 42223201112.

It can be written as a sum of positive squares in only one way, i.e., 20845584400 + 264647824 = 144380^2 + 16268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21110232196 and 21110232205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329847347 + ... + 329847410.

Almost surely, 2^21110232224 is an apocalyptic number.

It is an amenable number.

21110232224 is a deficient number, since it is larger than the sum of its proper divisors (20450537530).

21110232224 is an equidigital number, since it uses as much as digits as its factorization.

21110232224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659694767 (or 659694759 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21110232224 its reverse (42223201112), we get a palindrome (63333433336).

The spelling of 21110232224 in words is "twenty-one billion, one hundred ten million, two hundred thirty-two thousand, two hundred twenty-four".