21013300223 has 4 divisors (see below), whose sum is σ = 21041968488. Its totient is φ = 20984631960.

The previous prime is 21013300207. The next prime is 21013300247. The reversal of 21013300223 is 32200331012.

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

It is a cyclic number.

It is not a de Polignac number, because 21013300223 - 2⁴ = 21013300207 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 (21013300723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14333033 + ... + 14334498.

It is an arithmetic number, because the mean of its divisors is an integer number (5260492122).

Almost surely, 2^21013300223 is an apocalyptic number.

21013300223 is a deficient number, since it is larger than the sum of its proper divisors (28668265).

21013300223 is an equidigital number, since it uses as much as digits as its factorization.

21013300223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28668264.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21013300223 its reverse (32200331012), we get a palindrome (53213631235).

The spelling of 21013300223 in words is "twenty-one billion, thirteen million, three hundred thousand, two hundred twenty-three".