23211012191 has 2 divisors, whose sum is σ = 23211012192. Its totient is φ = 23211012190.

The previous prime is 23211012179. The next prime is 23211012229. The reversal of 23211012191 is 19121011232.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23211012191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23211012491) 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 as a sum of consecutive naturals, namely, 11605506095 + 11605506096.

It is an arithmetic number, because the mean of its divisors is an integer number (11605506096).

Almost surely, 2^23211012191 is an apocalyptic number.

23211012191 is a deficient number, since it is larger than the sum of its proper divisors (1).

23211012191 is an equidigital number, since it uses as much as digits as its factorization.

23211012191 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 23211012191 in words is "twenty-three billion, two hundred eleven million, twelve thousand, one hundred ninety-one".