21023130223 has 8 divisors (see below), whose sum is σ = 22282821792. Its totient is φ = 19765998336.

The previous prime is 21023130181. The next prime is 21023130251. The reversal of 21023130223 is 32203132012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21023130223 - 2⁹ = 21023129711 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 21023130223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023130253) 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 in 7 ways as a sum of consecutive naturals, for example, 622990 + ... + 655867.

It is an arithmetic number, because the mean of its divisors is an integer number (2785352724).

Almost surely, 2^21023130223 is an apocalyptic number.

21023130223 is a deficient number, since it is larger than the sum of its proper divisors (1259691569).

21023130223 is a wasteful number, since it uses less digits than its factorization.

21023130223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279841.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21023130223 its reverse (32203132012), we get a palindrome (53226262235).

The spelling of 21023130223 in words is "twenty-one billion, twenty-three million, one hundred thirty thousand, two hundred twenty-three".