23111222201 has 2 divisors, whose sum is σ = 23111222202. Its totient is φ = 23111222200.

The previous prime is 23111222191. The next prime is 23111222257. The reversal of 23111222201 is 10222211132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16397058601 + 6714163600 = 128051^2 + 81940^2 .

It is a cyclic number.

It is not a de Polignac number, because 23111222201 - 2⁶ = 23111222137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23111222201.

It is not a weakly prime, because it can be changed into another prime (23111221201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11555611100 + 11555611101.

It is an arithmetic number, because the mean of its divisors is an integer number (11555611101).

Almost surely, 2^23111222201 is an apocalyptic number.

It is an amenable number.

23111222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

23111222201 is an equidigital number, since it uses as much as digits as its factorization.

23111222201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 23111222201 its reverse (10222211132), we get a palindrome (33333433333).

The spelling of 23111222201 in words is "twenty-three billion, one hundred eleven million, two hundred twenty-two thousand, two hundred one".