101191 has 4 divisors (see below), whose sum is σ = 103392. Its totient is φ = 98992.

The previous prime is 101183. The next prime is 101197. The reversal of 101191 is 191101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101191 - 2³ = 101183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (25848).

2¹⁰¹¹⁹¹ is an apocalyptic number.

101191 is a deficient number, since it is larger than the sum of its proper divisors (2201).

101191 is an equidigital number, since it uses as much as digits as its factorization.

101191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 101191 is about 318.1053284684. The cubic root of 101191 is about 46.5994326590.

Adding to 101191 its reverse (191101), we get a palindrome (292292).

It can be divided in two parts, 101 and 191, that multiplied together give a palindrome (19291).

The spelling of 101191 in words is "one hundred one thousand, one hundred ninety-one".