23120231221 has 4 divisors (see below), whose sum is σ = 23241279744. Its totient is φ = 22999182700.

The previous prime is 23120231219. The next prime is 23120231279. The reversal of 23120231221 is 12213202132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23120231221 - 2¹ = 23120231219 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 (23120231521) 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, 60523975 + ... + 60524356.

It is an arithmetic number, because the mean of its divisors is an integer number (5810319936).

Almost surely, 2^23120231221 is an apocalyptic number.

It is an amenable number.

23120231221 is a deficient number, since it is larger than the sum of its proper divisors (121048523).

23120231221 is a wasteful number, since it uses less digits than its factorization.

23120231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121048522.

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

Adding to 23120231221 its reverse (12213202132), we get a palindrome (35333433353).

The spelling of 23120231221 in words is "twenty-three billion, one hundred twenty million, two hundred thirty-one thousand, two hundred twenty-one".