21310222210 has 8 divisors (see below), whose sum is σ = 38358399996. Its totient is φ = 8524088880.

The previous prime is 21310222169. The next prime is 21310222229. The reversal of 21310222210 is 1222201312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19216336129 + 2093886081 = 138623^2 + 45759^2 .

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

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, 1065511101 + ... + 1065511120.

Almost surely, 2^21310222210 is an apocalyptic number.

21310222210 is a deficient number, since it is larger than the sum of its proper divisors (17048177786).

21310222210 is a wasteful number, since it uses less digits than its factorization.

21310222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131022228.

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

Adding to 21310222210 its reverse (1222201312), we get a palindrome (22532423522).

The spelling of 21310222210 in words is "twenty-one billion, three hundred ten million, two hundred twenty-two thousand, two hundred ten".