21313003211 has 8 divisors (see below), whose sum is σ = 21512361024. Its totient is φ = 21114201160.

The previous prime is 21313003169. The next prime is 21313003213. The reversal of 21313003211 is 11230031312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21313003211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21313003211.

It is not an unprimeable number, because it can be changed into a prime (21313003213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61685 + ... + 215478.

It is an arithmetic number, because the mean of its divisors is an integer number (2689045128).

Almost surely, 2^21313003211 is an apocalyptic number.

21313003211 is a deficient number, since it is larger than the sum of its proper divisors (199357813).

21313003211 is a wasteful number, since it uses less digits than its factorization.

21313003211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277881.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21313003211 its reverse (11230031312), we get a palindrome (32543034523).

The spelling of 21313003211 in words is "twenty-one billion, three hundred thirteen million, three thousand, two hundred eleven".