101091 has 8 divisors (see below), whose sum is σ = 139264. Its totient is φ = 65160.

The previous prime is 101089. The next prime is 101107. The reversal of 101091 is 190101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101091 - 2¹ = 101089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451 + ... + 636.

It is an arithmetic number, because the mean of its divisors is an integer number (17408).

2¹⁰¹⁰⁹¹ is an apocalyptic number.

101091 is a deficient number, since it is larger than the sum of its proper divisors (38173).

101091 is a wasteful number, since it uses less digits than its factorization.

101091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 101091 is about 317.9481089738. The cubic root of 101091 is about 46.5840772778.

Adding to 101091 its reverse (190101), we get a palindrome (291192).

The spelling of 101091 in words is "one hundred one thousand, ninety-one".