21313033223 has 2 divisors, whose sum is σ = 21313033224. Its totient is φ = 21313033222.

The previous prime is 21313033213. The next prime is 21313033243. The reversal of 21313033223 is 32233031312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21313033223 - 2²⁰ = 21311984647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313033213) by changing a digit.

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 as a sum of consecutive naturals, namely, 10656516611 + 10656516612.

It is an arithmetic number, because the mean of its divisors is an integer number (10656516612).

Almost surely, 2^21313033223 is an apocalyptic number.

21313033223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313033223 is an equidigital number, since it uses as much as digits as its factorization.

21313033223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21313033223 its reverse (32233031312), we get a palindrome (53546064535).

The spelling of 21313033223 in words is "twenty-one billion, three hundred thirteen million, thirty-three thousand, two hundred twenty-three".