111080381 has 4 divisors (see below), whose sum is σ = 111249600. Its totient is φ = 110911164.

The previous prime is 111080369. The next prime is 111080383. The reversal of 111080381 is 183080111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183080111 = 43 ⋅4257677.

It is a cyclic number.

It is not a de Polignac number, because 111080381 - 2¹⁸ = 110818237 is a prime.

It is a super-2 number, since 2×111080381² = 24677702086210322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111080383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83621 + ... + 84938.

It is an arithmetic number, because the mean of its divisors is an integer number (27812400).

Almost surely, 2^111080381 is an apocalyptic number.

It is an amenable number.

111080381 is a deficient number, since it is larger than the sum of its proper divisors (169219).

111080381 is an equidigital number, since it uses as much as digits as its factorization.

111080381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169218.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 111080381 is about 10539.4677759363. The cubic root of 111080381 is about 480.7055321930.

The spelling of 111080381 in words is "one hundred eleven million, eighty thousand, three hundred eighty-one".