21201302210 has 64 divisors (see below), whose sum is σ = 42518079360. Its totient is φ = 7546106880.

The previous prime is 21201302197. The next prime is 21201302267. The reversal of 21201302210 is 1220310212.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2578586 + ... + 2586794.

It is an arithmetic number, because the mean of its divisors is an integer number (664344990).

Almost surely, 2^21201302210 is an apocalyptic number.

21201302210 is an abundant number, since it is smaller than the sum of its proper divisors (21316777150).

21201302210 is a wasteful number, since it uses less digits than its factorization.

21201302210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8723.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21201302210 its reverse (1220310212), we get a palindrome (22421612422).

The spelling of 21201302210 in words is "twenty-one billion, two hundred one million, three hundred two thousand, two hundred ten".