21124434222 has 96 divisors (see below), whose sum is σ = 48290411520. Its totient is φ = 6664896000.

The previous prime is 21124434217. The next prime is 21124434229. The reversal of 21124434222 is 22243442112.

It is a happy number.

21124434222 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 4 + 434 + 222 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124434229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6945022 + ... + 6948062.

It is an arithmetic number, because the mean of its divisors is an integer number (503025120).

Almost surely, 2^21124434222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21124434222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24145205760).

21124434222 is an abundant number, since it is smaller than the sum of its proper divisors (27165977298).

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

21124434222 is a wasteful number, since it uses less digits than its factorization.

21124434222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350 (or 3347 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

Adding to 21124434222 its reverse (22243442112), we get a palindrome (43367876334).

The spelling of 21124434222 in words is "twenty-one billion, one hundred twenty-four million, four hundred thirty-four thousand, two hundred twenty-two".