21202222022 has 8 divisors (see below), whose sum is σ = 31830495672. Its totient is φ = 10592056800.

The previous prime is 21202222021. The next prime is 21202222039. The reversal of 21202222022 is 22022220212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202222021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4524179 + ... + 4528862.

It is an arithmetic number, because the mean of its divisors is an integer number (3978811959).

Almost surely, 2^21202222022 is an apocalyptic number.

21202222022 is a deficient number, since it is larger than the sum of its proper divisors (10628273650).

21202222022 is a wasteful number, since it uses less digits than its factorization.

21202222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9054214.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21202222022 its reverse (22022220212), we get a palindrome (43224442234).

The spelling of 21202222022 in words is "twenty-one billion, two hundred two million, two hundred twenty-two thousand, twenty-two".