21322002224 has 20 divisors (see below), whose sum is σ = 42735910560. Its totient is φ = 10293380160.

The previous prime is 21322002223. The next prime is 21322002227. The reversal of 21322002224 is 42220022312.

It is a junction number, because it is equal to n+sod(n) for n = 21322002196 and 21322002205.

It is not an unprimeable number, because it can be changed into a prime (21322002223) 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, 22975832 + ... + 22976759.

It is an arithmetic number, because the mean of its divisors is an integer number (2136795528).

Almost surely, 2^21322002224 is an apocalyptic number.

It is an amenable number.

21322002224 is an abundant number, since it is smaller than the sum of its proper divisors (21413908336).

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

21322002224 is a wasteful number, since it uses less digits than its factorization.

21322002224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45952628 (or 45952622 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21322002224 its reverse (42220022312), we get a palindrome (63542024536).

The spelling of 21322002224 in words is "twenty-one billion, three hundred twenty-two million, two thousand, two hundred twenty-four".