23201121191 has 2 divisors, whose sum is σ = 23201121192. Its totient is φ = 23201121190.

The previous prime is 23201121187. The next prime is 23201121193. The reversal of 23201121191 is 19112110232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23201121191 - 2² = 23201121187 is a prime.

Together with 23201121193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23201121193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600560595 + 11600560596.

It is an arithmetic number, because the mean of its divisors is an integer number (11600560596).

Almost surely, 2^23201121191 is an apocalyptic number.

23201121191 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201121191 is an equidigital number, since it uses as much as digits as its factorization.

23201121191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 23201121191 in words is "twenty-three billion, two hundred one million, one hundred twenty-one thousand, one hundred ninety-one".