21220203322 has 8 divisors (see below), whose sum is σ = 31966916436. Its totient is φ = 10564564512.

The previous prime is 21220203293. The next prime is 21220203337. The reversal of 21220203322 is 22330202212.

It can be written as a sum of positive squares in 2 ways, for example, as 16162291161 + 5057912161 = 127131^2 + 71119^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21220203322.

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, 22767993 + ... + 22768924.

Almost surely, 2^21220203322 is an apocalyptic number.

21220203322 is a deficient number, since it is larger than the sum of its proper divisors (10746713114).

21220203322 is a wasteful number, since it uses less digits than its factorization.

21220203322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45537152.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21220203322 its reverse (22330202212), we get a palindrome (43550405534).

The spelling of 21220203322 in words is "twenty-one billion, two hundred twenty million, two hundred three thousand, three hundred twenty-two".