21224310224 has 20 divisors (see below), whose sum is σ = 44285340036. Its totient is φ = 9795835392.

The previous prime is 21224310209. The next prime is 21224310257. The reversal of 21224310224 is 42201342212.

It can be written as a sum of positive squares in 2 ways, for example, as 9502350400 + 11721959824 = 97480^2 + 108268^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21224310224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51019769 + ... + 51020184.

Almost surely, 2^21224310224 is an apocalyptic number.

It is an amenable number.

21224310224 is an abundant number, since it is smaller than the sum of its proper divisors (23061029812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21224310224 is a wasteful number, since it uses less digits than its factorization.

21224310224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102039974 (or 102039968 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21224310224 its reverse (42201342212), we get a palindrome (63425652436).

The spelling of 21224310224 in words is "twenty-one billion, two hundred twenty-four million, three hundred ten thousand, two hundred twenty-four".