23201201221 has 8 divisors (see below), whose sum is σ = 25725326688. Its totient is φ = 20746230000.

The previous prime is 23201201183. The next prime is 23201201227. The reversal of 23201201221 is 12210210232.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23201201221 - 2⁹ = 23201200709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23201201195 and 23201201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201201227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17287855 + ... + 17289196.

It is an arithmetic number, because the mean of its divisors is an integer number (3215665836).

Almost surely, 2^23201201221 is an apocalyptic number.

It is an amenable number.

23201201221 is a deficient number, since it is larger than the sum of its proper divisors (2524125467).

23201201221 is a wasteful number, since it uses less digits than its factorization.

23201201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34577123.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 23201201221 its reverse (12210210232), we get a palindrome (35411411453).

It can be divided in two parts, 23201 and 201221, that added together give a palindrome (224422).

The spelling of 23201201221 in words is "twenty-three billion, two hundred one million, two hundred one thousand, two hundred twenty-one".