21043224322 has 4 divisors (see below), whose sum is σ = 31564836486. Its totient is φ = 10521612160.

The previous prime is 21043224313. The next prime is 21043224353. The reversal of 21043224322 is 22342234012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17564465961 + 3478758361 = 132531^2 + 58981^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260806079 + ... + 5260806082.

Almost surely, 2^21043224322 is an apocalyptic number.

21043224322 is a deficient number, since it is larger than the sum of its proper divisors (10521612164).

21043224322 is a wasteful number, since it uses less digits than its factorization.

21043224322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10521612163.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21043224322 its reverse (22342234012), we get a palindrome (43385458334).

The spelling of 21043224322 in words is "twenty-one billion, forty-three million, two hundred twenty-four thousand, three hundred twenty-two".