21213301210 has 8 divisors (see below), whose sum is σ = 38183942196. Its totient is φ = 8485320480.

The previous prime is 21213301181. The next prime is 21213301229. The reversal of 21213301210 is 1210331212.

It can be written as a sum of positive squares in 2 ways, for example, as 21198486409 + 14814801 = 145597^2 + 3849^2 .

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, 1060665051 + ... + 1060665070.

Almost surely, 2^21213301210 is an apocalyptic number.

21213301210 is a deficient number, since it is larger than the sum of its proper divisors (16970640986).

21213301210 is a wasteful number, since it uses less digits than its factorization.

21213301210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121330128.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21213301210 its reverse (1210331212), we get a palindrome (22423632422).

The spelling of 21213301210 in words is "twenty-one billion, two hundred thirteen million, three hundred one thousand, two hundred ten".