21234504222 has 48 divisors (see below), whose sum is σ = 48209541120. Its totient is φ = 6742062096.

The previous prime is 21234504169. The next prime is 21234504223. The reversal of 21234504222 is 22240543212.

21234504222 is a `hidden beast` number, since 2 + 1 + 234 + 5 + 0 + 422 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234504223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8358 + ... + 206249.

It is an arithmetic number, because the mean of its divisors is an integer number (1004365440).

Almost surely, 2^21234504222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21234504222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24104770560).

21234504222 is an abundant number, since it is smaller than the sum of its proper divisors (26975036898).

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

21234504222 is a wasteful number, since it uses less digits than its factorization.

21234504222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214877 (or 214874 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The spelling of 21234504222 in words is "twenty-one billion, two hundred thirty-four million, five hundred four thousand, two hundred twenty-two".