21203221322 has 8 divisors (see below), whose sum is σ = 31805458500. Its totient is φ = 10601401824.

The previous prime is 21203221313. The next prime is 21203221331. The reversal of 21203221322 is 22312230212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21203221313) and next prime (21203221331).

It can be written as a sum of positive squares in 2 ways, for example, as 19650152041 + 1553069281 = 140179^2 + 39409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21203221294 and 21203221303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113204 + ... + 234992.

Almost surely, 2^21203221322 is an apocalyptic number.

21203221322 is a deficient number, since it is larger than the sum of its proper divisors (10602237178).

21203221322 is a wasteful number, since it uses less digits than its factorization.

21203221322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208840.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21203221322 its reverse (22312230212), we get a palindrome (43515451534).

The spelling of 21203221322 in words is "twenty-one billion, two hundred three million, two hundred twenty-one thousand, three hundred twenty-two".