21313113203 has 16 divisors (see below), whose sum is σ = 21817589760. Its totient is φ = 20814847200.

The previous prime is 21313113191. The next prime is 21313113209. The reversal of 21313113203 is 30231131312.

It is a cyclic number.

It is not a de Polignac number, because 21313113203 - 2¹⁰ = 21313112179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313113209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7401518 + ... + 7404396.

It is an arithmetic number, because the mean of its divisors is an integer number (1363599360).

Almost surely, 2^21313113203 is an apocalyptic number.

21313113203 is a deficient number, since it is larger than the sum of its proper divisors (504476557).

21313113203 is a wasteful number, since it uses less digits than its factorization.

21313113203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21313113203 its reverse (30231131312), we get a palindrome (51544244515).

The spelling of 21313113203 in words is "twenty-one billion, three hundred thirteen million, one hundred thirteen thousand, two hundred three".