21065564222 has 8 divisors (see below), whose sum is σ = 31608849672. Its totient is φ = 10529281000.

The previous prime is 21065564183. The next prime is 21065564227. The reversal of 21065564222 is 22246556012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21065564227) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1743029 + ... + 1755072.

It is an arithmetic number, because the mean of its divisors is an integer number (3951106209).

Almost surely, 2^21065564222 is an apocalyptic number.

21065564222 is a deficient number, since it is larger than the sum of its proper divisors (10543285450).

21065564222 is a wasteful number, since it uses less digits than its factorization.

21065564222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501114.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 21065564222 in words is "twenty-one billion, sixty-five million, five hundred sixty-four thousand, two hundred twenty-two".