101155 has 4 divisors (see below), whose sum is σ = 121392. Its totient is φ = 80920.

The previous prime is 101149. The next prime is 101159. The reversal of 101155 is 551101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551101 = 113 ⋅4877.

It is not a de Polignac number, because 101155 - 2⁷ = 101027 is a prime.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (101159) 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, 10111 + ... + 10120.

It is an arithmetic number, because the mean of its divisors is an integer number (30348).

2¹⁰¹¹⁵⁵ is an apocalyptic number.

101155 is a deficient number, since it is larger than the sum of its proper divisors (20237).

101155 is an equidigital number, since it uses as much as digits as its factorization.

101155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20236.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 101155 is about 318.0487384034. The cubic root of 101155 is about 46.5939058877.

Adding to 101155 its reverse (551101), we get a palindrome (652256).

It can be divided in two parts, 101 and 155, that added together give a 8-th power (256 = 2⁸).

The spelling of 101155 in words is "one hundred one thousand, one hundred fifty-five".