21224344422 has 16 divisors (see below), whose sum is σ = 42450370560. Its totient is φ = 7074501192.

The previous prime is 21224344387. The next prime is 21224344439. The reversal of 21224344422 is 22444342212.

It is a happy number.

It is a super-2 number, since 2×21224344422² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21224344422.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 144579 + ... + 251697.

It is an arithmetic number, because the mean of its divisors is an integer number (2653148160).

Almost surely, 2^21224344422 is an apocalyptic number.

21224344422 is an abundant number, since it is smaller than the sum of its proper divisors (21226026138).

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

21224344422 is a wasteful number, since it uses less digits than its factorization.

21224344422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140147.

The product of its digits is 24576, while the sum is 30.

Adding to 21224344422 its reverse (22444342212), we get a palindrome (43668686634).

The spelling of 21224344422 in words is "twenty-one billion, two hundred twenty-four million, three hundred forty-four thousand, four hundred twenty-two".