21202202222 has 8 divisors (see below), whose sum is σ = 33674085936. Its totient is φ = 9977506912.

The previous prime is 21202202213. The next prime is 21202202243. The reversal of 21202202222 is 22220220212.

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

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21202202222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311797058 + ... + 311797125.

It is an arithmetic number, because the mean of its divisors is an integer number (4209260742).

Almost surely, 2^21202202222 is an apocalyptic number.

21202202222 is a deficient number, since it is larger than the sum of its proper divisors (12471883714).

21202202222 is a wasteful number, since it uses less digits than its factorization.

21202202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623594202.

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

Adding to 21202202222 its reverse (22220220212), we get a palindrome (43422422434).

The spelling of 21202202222 in words is "twenty-one billion, two hundred two million, two hundred two thousand, two hundred twenty-two".