21344344122 has 16 divisors (see below), whose sum is σ = 43494135840. Its totient is φ = 6980540112.

The previous prime is 21344344111. The next prime is 21344344129. The reversal of 21344344122 is 22144344312.

It is a self number, because there is not a number n which added to its sum of digits gives 21344344122.

It is not an unprimeable number, because it can be changed into a prime (21344344129) 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 7 ways as a sum of consecutive naturals, for example, 33559972 + ... + 33560607.

It is an arithmetic number, because the mean of its divisors is an integer number (2718383490).

Almost surely, 2^21344344122 is an apocalyptic number.

21344344122 is an abundant number, since it is smaller than the sum of its proper divisors (22149791718).

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

21344344122 is a wasteful number, since it uses less digits than its factorization.

21344344122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67120637.

The product of its digits is 18432, while the sum is 30.

Adding to 21344344122 its reverse (22144344312), we get a palindrome (43488688434).

The spelling of 21344344122 in words is "twenty-one billion, three hundred forty-four million, three hundred forty-four thousand, one hundred twenty-two".