211102020191 has 2 divisors, whose sum is σ = 211102020192. Its totient is φ = 211102020190.

The previous prime is 211102020163. The next prime is 211102020247. The reversal of 211102020191 is 191020201112.

211102020191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211102020191 - 2⁶ = 211102020127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211102020161) 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, 105551010095 + 105551010096.

It is an arithmetic number, because the mean of its divisors is an integer number (105551010096).

Almost surely, 2^211102020191 is an apocalyptic number.

211102020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

211102020191 is an equidigital number, since it uses as much as digits as its factorization.

211102020191 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 20.

The spelling of 211102020191 in words is "two hundred eleven billion, one hundred two million, twenty thousand, one hundred ninety-one".