21124202224 has 20 divisors (see below), whose sum is σ = 40932072144. Its totient is φ = 10561086848.

The previous prime is 21124202221. The next prime is 21124202233. The reversal of 21124202224 is 42220242112.

It is a junction number, because it is equal to n+sod(n) for n = 21124202195 and 21124202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124202221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125484 + ... + 240820.

Almost surely, 2^21124202224 is an apocalyptic number.

It is an amenable number.

21124202224 is a deficient number, since it is larger than the sum of its proper divisors (19807869920).

21124202224 is a wasteful number, since it uses less digits than its factorization.

21124202224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126792 (or 126786 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21124202224 its reverse (42220242112), we get a palindrome (63344444336).

The spelling of 21124202224 in words is "twenty-one billion, one hundred twenty-four million, two hundred two thousand, two hundred twenty-four".