23201345221 has 16 divisors (see below), whose sum is σ = 25898158080. Its totient is φ = 20682512640.

The previous prime is 23201345161. The next prime is 23201345239. The reversal of 23201345221 is 12254310232.

It is a cyclic number.

It is not a de Polignac number, because 23201345221 - 2¹⁷ = 23201214149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201345021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 443586 + ... + 493123.

It is an arithmetic number, because the mean of its divisors is an integer number (1618634880).

Almost surely, 2^23201345221 is an apocalyptic number.

It is an amenable number.

23201345221 is a deficient number, since it is larger than the sum of its proper divisors (2696812859).

23201345221 is a wasteful number, since it uses less digits than its factorization.

23201345221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936804.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 23201345221 its reverse (12254310232), we get a palindrome (35455655453).

The spelling of 23201345221 in words is "twenty-three billion, two hundred one million, three hundred forty-five thousand, two hundred twenty-one".