21242232222 has 16 divisors (see below), whose sum is σ = 44331615360. Its totient is φ = 6772885592.

The previous prime is 21242232211. The next prime is 21242232239. The reversal of 21242232222 is 22223224212.

It is a junction number, because it is equal to n+sod(n) for n = 21242232192 and 21242232201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76964472 + ... + 76964747.

It is an arithmetic number, because the mean of its divisors is an integer number (2770725960).

Almost surely, 2^21242232222 is an apocalyptic number.

21242232222 is an abundant number, since it is smaller than the sum of its proper divisors (23089383138).

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

21242232222 is a wasteful number, since it uses less digits than its factorization.

21242232222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153929247.

The product of its digits is 3072, while the sum is 24.

Adding to 21242232222 its reverse (22223224212), we get a palindrome (43465456434).

The spelling of 21242232222 in words is "twenty-one billion, two hundred forty-two million, two hundred thirty-two thousand, two hundred twenty-two".