211121220101191 has 2 divisors, whose sum is σ = 211121220101192. Its totient is φ = 211121220101190.

The previous prime is 211121220101189. The next prime is 211121220101227. The reversal of 211121220101191 is 191101022121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211121220101191 - 2¹ = 211121220101189 is a prime.

Together with 211121220101189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211121220104191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560610050595 + 105560610050596.

It is an arithmetic number, because the mean of its divisors is an integer number (105560610050596).

Almost surely, 2^{211121220101191} is an apocalyptic number.

211121220101191 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121220101191 is an equidigital number, since it uses as much as digits as its factorization.

211121220101191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 211121220101191 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one hundred one thousand, one hundred ninety-one".