22121321344 has 32 divisors (see below), whose sum is σ = 44237453040. Its totient is φ = 11018588160.

The previous prime is 22121321309. The next prime is 22121321357. The reversal of 22121321344 is 44312312122.

It is a tau number, because it is divible by the number of its divisors (32).

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, 294897 + ... + 362224.

Almost surely, 2^22121321344 is an apocalyptic number.

It is an amenable number.

22121321344 is a deficient number, since it is larger than the sum of its proper divisors (22116131696).

22121321344 is an equidigital number, since it uses as much as digits as its factorization.

22121321344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657398 (or 657386 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

Adding to 22121321344 its reverse (44312312122), we get a palindrome (66433633466).

The spelling of 22121321344 in words is "twenty-two billion, one hundred twenty-one million, three hundred twenty-one thousand, three hundred forty-four".