21222332210 has 32 divisors (see below), whose sum is σ = 38612125440. Its totient is φ = 8397476352.

The previous prime is 21222332147. The next prime is 21222332213. The reversal of 21222332210 is 1223322212.

It is a happy number.

21222332210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21222332213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2924807 + ... + 2932053.

It is an arithmetic number, because the mean of its divisors is an integer number (1206628920).

Almost surely, 2^21222332210 is an apocalyptic number.

21222332210 is a deficient number, since it is larger than the sum of its proper divisors (17389793230).

21222332210 is a wasteful number, since it uses less digits than its factorization.

21222332210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21222332210 its reverse (1223322212), we get a palindrome (22445654422).

It can be divided in two parts, 2122 and 2332210, that added together give a palindrome (2334332).

The spelling of 21222332210 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty-two thousand, two hundred ten".