21227221168 has 10 divisors (see below), whose sum is σ = 41127741044. Its totient is φ = 10613610576.

The previous prime is 21227221159. The next prime is 21227221193. The reversal of 21227221168 is 86112272212.

It is an unprimeable number.

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, 663350646 + ... + 663350677.

Almost surely, 2^21227221168 is an apocalyptic number.

It is an amenable number.

21227221168 is a deficient number, since it is larger than the sum of its proper divisors (19900519876).

21227221168 is a wasteful number, since it uses less digits than its factorization.

21227221168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326701331 (or 1326701325 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The spelling of 21227221168 in words is "twenty-one billion, two hundred twenty-seven million, two hundred twenty-one thousand, one hundred sixty-eight".