21023310223 has 8 divisors (see below), whose sum is σ = 21326015600. Its totient is φ = 20721002688.

The previous prime is 21023310197. The next prime is 21023310227. The reversal of 21023310223 is 32201332012.

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 21023310223 - 2²¹ = 21021213071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21023310223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023310227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7813 + ... + 205201.

It is an arithmetic number, because the mean of its divisors is an integer number (2665751950).

Almost surely, 2^21023310223 is an apocalyptic number.

21023310223 is a deficient number, since it is larger than the sum of its proper divisors (302705377).

21023310223 is a wasteful number, since it uses less digits than its factorization.

21023310223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198921.

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

Adding to 21023310223 its reverse (32201332012), we get a palindrome (53224642235).

The spelling of 21023310223 in words is "twenty-one billion, twenty-three million, three hundred ten thousand, two hundred twenty-three".