21122344424 has 32 divisors (see below), whose sum is σ = 40305406080. Its totient is φ = 10375098624.

The previous prime is 21122344393. The next prime is 21122344429. The reversal of 21122344424 is 42444322112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21122344429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143024 + ... + 250400.

It is an arithmetic number, because the mean of its divisors is an integer number (1259543940).

Almost surely, 2^21122344424 is an apocalyptic number.

It is an amenable number.

21122344424 is a deficient number, since it is larger than the sum of its proper divisors (19183061656).

21122344424 is a wasteful number, since it uses less digits than its factorization.

21122344424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107817 (or 107813 counting only the distinct ones).

The product of its digits is 12288, while the sum is 29.

Adding to 21122344424 its reverse (42444322112), we get a palindrome (63566666536).

The spelling of 21122344424 in words is "twenty-one billion, one hundred twenty-two million, three hundred forty-four thousand, four hundred twenty-four".