21313203133 has 4 divisors (see below), whose sum is σ = 21313544320. Its totient is φ = 21312861948.

The previous prime is 21313203101. The next prime is 21313203137. The reversal of 21313203133 is 33130231312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21313203133 - 2⁵ = 21313203101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313203137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47085 + ... + 211762.

It is an arithmetic number, because the mean of its divisors is an integer number (5328386080).

Almost surely, 2^21313203133 is an apocalyptic number.

It is an amenable number.

21313203133 is a deficient number, since it is larger than the sum of its proper divisors (341187).

21313203133 is an equidigital number, since it uses as much as digits as its factorization.

21313203133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341186.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21313203133 its reverse (33130231312), we get a palindrome (54443434445).

The spelling of 21313203133 in words is "twenty-one billion, three hundred thirteen million, two hundred three thousand, one hundred thirty-three".