21322222210 has 8 divisors (see below), whose sum is σ = 38379999996. Its totient is φ = 8528888880.

The previous prime is 21322222111. The next prime is 21322222217. The reversal of 21322222210 is 1222222312.

It can be written as a sum of positive squares in 2 ways, for example, as 20969646481 + 352575729 = 144809^2 + 18777^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21322222217) 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, 1066111101 + ... + 1066111120.

Almost surely, 2^21322222210 is an apocalyptic number.

21322222210 is a deficient number, since it is larger than the sum of its proper divisors (17057777786).

21322222210 is a wasteful number, since it uses less digits than its factorization.

21322222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132222228.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21322222210 its reverse (1222222312), we get a palindrome (22544444522).

The spelling of 21322222210 in words is "twenty-one billion, three hundred twenty-two million, two hundred twenty-two thousand, two hundred ten".