111278113 has 4 divisors (see below), whose sum is σ = 112090500. Its totient is φ = 110465728.

The previous prime is 111278077. The next prime is 111278119. The reversal of 111278113 is 311872111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311872111 = 23 ⋅13559657.

It can be written as a sum of positive squares in 2 ways, for example, as 24285184 + 86992929 = 4928^2 + 9327^2 .

It is a cyclic number.

It is not a de Polignac number, because 111278113 - 2²¹ = 109180961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111278119) 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, 405988 + ... + 406261.

It is an arithmetic number, because the mean of its divisors is an integer number (28022625).

Almost surely, 2^111278113 is an apocalyptic number.

It is an amenable number.

111278113 is a deficient number, since it is larger than the sum of its proper divisors (812387).

111278113 is an equidigital number, since it uses as much as digits as its factorization.

111278113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812386.

The product of its digits is 336, while the sum is 25.

The square root of 111278113 is about 10548.8441546930. The cubic root of 111278113 is about 480.9905946009.

The spelling of 111278113 in words is "one hundred eleven million, two hundred seventy-eight thousand, one hundred thirteen".