21222103321 has 4 divisors (see below), whose sum is σ = 21349181952. Its totient is φ = 21095024692.

The previous prime is 21222103307. The next prime is 21222103367. The reversal of 21222103321 is 12330122212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21222103321 - 2¹¹ = 21222101273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222103121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63539065 + ... + 63539398.

It is an arithmetic number, because the mean of its divisors is an integer number (5337295488).

Almost surely, 2^21222103321 is an apocalyptic number.

It is an amenable number.

21222103321 is a deficient number, since it is larger than the sum of its proper divisors (127078631).

21222103321 is a wasteful number, since it uses less digits than its factorization.

21222103321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127078630.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21222103321 its reverse (12330122212), we get a palindrome (33552225533).

The spelling of 21222103321 in words is "twenty-one billion, two hundred twenty-two million, one hundred three thousand, three hundred twenty-one".