23201113021 has 2 divisors, whose sum is σ = 23201113022. Its totient is φ = 23201113020.

The previous prime is 23201112953. The next prime is 23201113037. The reversal of 23201113021 is 12031110232.

It is an a-pointer prime, because the next prime (23201113037) can be obtained adding 23201113021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22865673796 + 335439225 = 151214^2 + 18315^2 .

It is a cyclic number.

It is not a de Polignac number, because 23201113021 - 2²³ = 23192724413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23201112986 and 23201113004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23201117021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600556510 + 11600556511.

It is an arithmetic number, because the mean of its divisors is an integer number (11600556511).

Almost surely, 2^23201113021 is an apocalyptic number.

It is an amenable number.

23201113021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201113021 is an equidigital number, since it uses as much as digits as its factorization.

23201113021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 23201113021 its reverse (12031110232), we get a palindrome (35232223253).

The spelling of 23201113021 in words is "twenty-three billion, two hundred one million, one hundred thirteen thousand, twenty-one".