23332321021 has 4 divisors (see below), whose sum is σ = 23538801852. Its totient is φ = 23125840192.

The previous prime is 23332321013. The next prime is 23332321037. The reversal of 23332321021 is 12012323332.

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 11169319225 + 12163001796 = 105685^2 + 110286^2 .

It is a cyclic number.

It is not a de Polignac number, because 23332321021 - 2³ = 23332321013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23332320983 and 23332321001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23332321321) 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, 103240246 + ... + 103240471.

It is an arithmetic number, because the mean of its divisors is an integer number (5884700463).

Almost surely, 2^23332321021 is an apocalyptic number.

It is an amenable number.

23332321021 is a deficient number, since it is larger than the sum of its proper divisors (206480831).

23332321021 is a wasteful number, since it uses less digits than its factorization.

23332321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206480830.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 23332321021 its reverse (12012323332), we get a palindrome (35344644353).

The spelling of 23332321021 in words is "twenty-three billion, three hundred thirty-two million, three hundred twenty-one thousand, twenty-one".