21242224222 has 16 divisors (see below), whose sum is σ = 32071992192. Its totient is φ = 10551614040.

The previous prime is 21242224111. The next prime is 21242224249. The reversal of 21242224222 is 22242224212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 870447 + ... + 894517.

It is an arithmetic number, because the mean of its divisors is an integer number (2004499512).

Almost surely, 2^21242224222 is an apocalyptic number.

21242224222 is a deficient number, since it is larger than the sum of its proper divisors (10829767970).

21242224222 is a wasteful number, since it uses less digits than its factorization.

21242224222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26943.

The product of its digits is 4096, while the sum is 25.

Adding to 21242224222 its reverse (22242224212), we get a palindrome (43484448434).

The spelling of 21242224222 in words is "twenty-one billion, two hundred forty-two million, two hundred twenty-four thousand, two hundred twenty-two".