23032121221 has 4 divisors (see below), whose sum is σ = 23052890700. Its totient is φ = 23011351744.

The previous prime is 23032121171. The next prime is 23032121239. The reversal of 23032121221 is 12212123032.

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 9504105121 + 13528016100 = 97489^2 + 116310^2 .

It is a cyclic number.

It is not a de Polignac number, because 23032121221 - 2¹⁹ = 23031596933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23032121821) 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, 10383076 + ... + 10385293.

It is an arithmetic number, because the mean of its divisors is an integer number (5763222675).

Almost surely, 2^23032121221 is an apocalyptic number.

It is an amenable number.

23032121221 is a deficient number, since it is larger than the sum of its proper divisors (20769479).

23032121221 is a wasteful number, since it uses less digits than its factorization.

23032121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20769478.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23032121221 its reverse (12212123032), we get a palindrome (35244244253).

The spelling of 23032121221 in words is "twenty-three billion, thirty-two million, one hundred twenty-one thousand, two hundred twenty-one".