21303220322 has 4 divisors (see below), whose sum is σ = 31954830486. Its totient is φ = 10651610160.

The previous prime is 21303220321. The next prime is 21303220339. The reversal of 21303220322 is 22302230312.

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., 19532578081 + 1770642241 = 139759^2 + 42079^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21303220294 and 21303220303.

It is not an unprimeable number, because it can be changed into a prime (21303220321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325805079 + ... + 5325805082.

Almost surely, 2^21303220322 is an apocalyptic number.

21303220322 is a deficient number, since it is larger than the sum of its proper divisors (10651610164).

21303220322 is a wasteful number, since it uses less digits than its factorization.

21303220322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651610163.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21303220322 its reverse (22302230312), we get a palindrome (43605450634).

The spelling of 21303220322 in words is "twenty-one billion, three hundred three million, two hundred twenty thousand, three hundred twenty-two".