21321100222 has 16 divisors (see below), whose sum is σ = 33902209152. Its totient is φ = 10021818880.

The previous prime is 21321100217. The next prime is 21321100243. The reversal of 21321100222 is 22200112312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21321100196 and 21321100205.

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, 333979 + ... + 392662.

It is an arithmetic number, because the mean of its divisors is an integer number (2118888072).

Almost surely, 2^21321100222 is an apocalyptic number.

21321100222 is a deficient number, since it is larger than the sum of its proper divisors (12581108930).

21321100222 is a wasteful number, since it uses less digits than its factorization.

21321100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727523.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21321100222 its reverse (22200112312), we get a palindrome (43521212534).

The spelling of 21321100222 in words is "twenty-one billion, three hundred twenty-one million, one hundred thousand, two hundred twenty-two".