23201013020221 has 4 divisors (see below), whose sum is σ = 23229691652700. Its totient is φ = 23172334387744.

The previous prime is 23201013020179. The next prime is 23201013020267. The reversal of 23201013020221 is 12202031010232.

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 21303864903321 + 1897148116900 = 4615611^2 + 1377370^2 .

It is a cyclic number.

It is not a de Polignac number, because 23201013020221 - 2¹⁷ = 23201012889149 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 (23201013020621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14339315026 + ... + 14339316643.

It is an arithmetic number, because the mean of its divisors is an integer number (5807422913175).

Almost surely, 2^{23201013020221} is an apocalyptic number.

It is an amenable number.

23201013020221 is a deficient number, since it is larger than the sum of its proper divisors (28678632479).

23201013020221 is an equidigital number, since it uses as much as digits as its factorization.

23201013020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28678632478.

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

Adding to 23201013020221 its reverse (12202031010232), we get a palindrome (35403044030453).

The spelling of 23201013020221 in words is "twenty-three trillion, two hundred one billion, thirteen million, twenty thousand, two hundred twenty-one".