21222217586 has 16 divisors (see below), whose sum is σ = 32064726528. Its totient is φ = 10534255200.

The previous prime is 21222217573. The next prime is 21222217633. The reversal of 21222217586 is 68571222212.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 82631 + ... + 221973.

It is an arithmetic number, because the mean of its divisors is an integer number (2004045408).

Almost surely, 2^21222217586 is an apocalyptic number.

21222217586 is a deficient number, since it is larger than the sum of its proper divisors (10842508942).

21222217586 is a wasteful number, since it uses less digits than its factorization.

21222217586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139897.

The product of its digits is 53760, while the sum is 38.

Adding to 21222217586 its reverse (68571222212), we get a palindrome (89793439798).

The spelling of 21222217586 in words is "twenty-one billion, two hundred twenty-two million, two hundred seventeen thousand, five hundred eighty-six".