21210202222 has 8 divisors (see below), whose sum is σ = 34707603672. Its totient is φ = 9641001000.

The previous prime is 21210202219. The next prime is 21210202229. The reversal of 21210202222 is 22220201212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21210202196 and 21210202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210202229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482050029 + ... + 482050072.

It is an arithmetic number, because the mean of its divisors is an integer number (4338450459).

Almost surely, 2^21210202222 is an apocalyptic number.

21210202222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21210202222 is a deficient number, since it is larger than the sum of its proper divisors (13497401450).

21210202222 is a wasteful number, since it uses less digits than its factorization.

21210202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964100114.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21210202222 its reverse (22220201212), we get a palindrome (43430403434).

The spelling of 21210202222 in words is "twenty-one billion, two hundred ten million, two hundred two thousand, two hundred twenty-two".