111151 has 4 divisors (see below), whose sum is σ = 113904. Its totient is φ = 108400.

The previous prime is 111149. The next prime is 111187. The reversal of 111151 is 151111.

111151 is nontrivially palindromic in base 11.

111151 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151111 = 137 ⋅1103.

It is a cyclic number.

It is not a de Polignac number, because 111151 - 2¹ = 111149 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 (111121) by changing a digit.

It is a nontrivial repunit in base 18.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315 + ... + 1396.

It is an arithmetic number, because the mean of its divisors is an integer number (28476).

2¹¹¹¹⁵¹ is an apocalyptic number.

111151 is a deficient number, since it is larger than the sum of its proper divisors (2753).

111151 is an equidigital number, since it uses as much as digits as its factorization.

111151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752.

The product of its digits is 5, while the sum is 10.

The square root of 111151 is about 333.3931612976. The cubic root of 111151 is about 48.0807379619.

Adding to 111151 its reverse (151111), we get a palindrome (262262).

It can be divided in two parts, 111 and 151, that multiplied together give a palindrome (16761).

The spelling of 111151 in words is "one hundred eleven thousand, one hundred fifty-one".