21227104422 has 48 divisors (see below), whose sum is σ = 47636905680. Its totient is φ = 6823252800.

The previous prime is 21227104357. The next prime is 21227104427. The reversal of 21227104422 is 22440172212.

It is a happy number.

21227104422 is a `hidden beast` number, since 2 + 1 + 227 + 10 + 4 + 422 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227104427) 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 23 ways as a sum of consecutive naturals, for example, 403797 + ... + 453327.

It is an arithmetic number, because the mean of its divisors is an integer number (992435535).

Almost surely, 2^21227104422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21227104422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23818452840).

21227104422 is an abundant number, since it is smaller than the sum of its proper divisors (26409801258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21227104422 is a wasteful number, since it uses less digits than its factorization.

21227104422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50389 (or 50386 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

Adding to 21227104422 its reverse (22440172212), we get a palindrome (43667276634).

The spelling of 21227104422 in words is "twenty-one billion, two hundred twenty-seven million, one hundred four thousand, four hundred twenty-two".