21444122422 has 8 divisors (see below), whose sum is σ = 34058312136. Its totient is φ = 10091351712.

The previous prime is 21444122411. The next prime is 21444122431. The reversal of 21444122422 is 22422144412.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315354708 + ... + 315354775.

It is an arithmetic number, because the mean of its divisors is an integer number (4257289017).

Almost surely, 2^21444122422 is an apocalyptic number.

21444122422 is a deficient number, since it is larger than the sum of its proper divisors (12614189714).

21444122422 is a wasteful number, since it uses less digits than its factorization.

21444122422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630709502.

The product of its digits is 8192, while the sum is 28.

Adding to 21444122422 its reverse (22422144412), we get a palindrome (43866266834).

The spelling of 21444122422 in words is "twenty-one billion, four hundred forty-four million, one hundred twenty-two thousand, four hundred twenty-two".