21330031100223 has 4 divisors (see below), whose sum is σ = 28440041466968. Its totient is φ = 14220020733480.

The previous prime is 21330031100201. The next prime is 21330031100237. The reversal of 21330031100223 is 32200113003312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21330031100223 - 2⁸ = 21330031099967 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 21330031100223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330031100263) 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, 3555005183368 + ... + 3555005183373.

It is an arithmetic number, because the mean of its divisors is an integer number (7110010366742).

Almost surely, 2^{21330031100223} is an apocalyptic number.

21330031100223 is a deficient number, since it is larger than the sum of its proper divisors (7110010366745).

21330031100223 is an equidigital number, since it uses as much as digits as its factorization.

21330031100223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110010366744.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21330031100223 its reverse (32200113003312), we get a palindrome (53530144103535).

The spelling of 21330031100223 in words is "twenty-one trillion, three hundred thirty billion, thirty-one million, one hundred thousand, two hundred twenty-three".