102191 has 2 divisors, whose sum is σ = 102192. Its totient is φ = 102190.

The previous prime is 102181. The next prime is 102197. The reversal of 102191 is 191201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51095 + 51096.

It is an arithmetic number, because the mean of its divisors is an integer number (51096).

2¹⁰²¹⁹¹ is an apocalyptic number.

102191 is a deficient number, since it is larger than the sum of its proper divisors (1).

102191 is an equidigital number, since it uses as much as digits as its factorization.

102191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 102191 is about 319.6732706999. The cubic root of 102191 is about 46.7524329808.

Adding to 102191 its reverse (191201), we get a palindrome (293392).

The spelling of 102191 in words is "one hundred two thousand, one hundred ninety-one".