23330221021 has 4 divisors (see below), whose sum is σ = 23899250844. Its totient is φ = 22761191200.

The previous prime is 23330221009. The next prime is 23330221027. The reversal of 23330221021 is 12012203332.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13277952900 + 10052268121 = 115230^2 + 100261^2 .

It is a cyclic number.

It is not a de Polignac number, because 23330221021 - 2⁵ = 23330220989 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 23330221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23330221027) 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, 284514850 + ... + 284514931.

It is an arithmetic number, because the mean of its divisors is an integer number (5974812711).

Almost surely, 2^23330221021 is an apocalyptic number.

It is an amenable number.

23330221021 is a deficient number, since it is larger than the sum of its proper divisors (569029823).

23330221021 is an equidigital number, since it uses as much as digits as its factorization.

23330221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569029822.

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

Adding to 23330221021 its reverse (12012203332), we get a palindrome (35342424353).

The spelling of 23330221021 in words is "twenty-three billion, three hundred thirty million, two hundred twenty-one thousand, twenty-one".