211102122191 has 2 divisors, whose sum is σ = 211102122192. Its totient is φ = 211102122190.

The previous prime is 211102122163. The next prime is 211102122227. The reversal of 211102122191 is 191221201112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211102122191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211102122991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105551061095 + 105551061096.

It is an arithmetic number, because the mean of its divisors is an integer number (105551061096).

Almost surely, 2^211102122191 is an apocalyptic number.

211102122191 is a deficient number, since it is larger than the sum of its proper divisors (1).

211102122191 is an equidigital number, since it uses as much as digits as its factorization.

211102122191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 211102122191 in words is "two hundred eleven billion, one hundred two million, one hundred twenty-two thousand, one hundred ninety-one".