22123303021 has 4 divisors (see below), whose sum is σ = 22159393852. Its totient is φ = 22087212192.

The previous prime is 22123303003. The next prime is 22123303031. The reversal of 22123303021 is 12030332122.

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 9738729225 + 12384573796 = 98685^2 + 111286^2 .

It is a cyclic number.

It is not a de Polignac number, because 22123303021 - 2²³ = 22114914413 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 22123303021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123303001) 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 3 ways as a sum of consecutive naturals, for example, 18044496 + ... + 18045721.

It is an arithmetic number, because the mean of its divisors is an integer number (5539848463).

Almost surely, 2^22123303021 is an apocalyptic number.

It is an amenable number.

22123303021 is a deficient number, since it is larger than the sum of its proper divisors (36090831).

22123303021 is an equidigital number, since it uses as much as digits as its factorization.

22123303021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36090830.

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

Adding to 22123303021 its reverse (12030332122), we get a palindrome (34153635143).

The spelling of 22123303021 in words is "twenty-two billion, one hundred twenty-three million, three hundred three thousand, twenty-one".