21221314210 has 8 divisors (see below), whose sum is σ = 38198365596. Its totient is φ = 8488525680.

The previous prime is 21221314193. The next prime is 21221314229. The reversal of 21221314210 is 1241312212.

It can be written as a sum of positive squares in 2 ways, for example, as 20998618281 + 222695929 = 144909^2 + 14923^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061065701 + ... + 1061065720.

Almost surely, 2^21221314210 is an apocalyptic number.

21221314210 is a deficient number, since it is larger than the sum of its proper divisors (16977051386).

21221314210 is a wasteful number, since it uses less digits than its factorization.

21221314210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122131428.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21221314210 its reverse (1241312212), we get a palindrome (22462626422).

The spelling of 21221314210 in words is "twenty-one billion, two hundred twenty-one million, three hundred fourteen thousand, two hundred ten".