111280681 has 2 divisors, whose sum is σ = 111280682. Its totient is φ = 111280680.

The previous prime is 111280651. The next prime is 111280709. The reversal of 111280681 is 186082111.

It is an a-pointer prime, because the next prime (111280709) can be obtained adding 111280681 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91030681 + 20250000 = 9541^2 + 4500^2 .

It is an emirp because it is prime and its reverse (186082111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111280681 - 2⁵ = 111280649 is a prime.

It is a super-2 number, since 2×111280681² = 24766779927647522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111280651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55640340 + 55640341.

It is an arithmetic number, because the mean of its divisors is an integer number (55640341).

Almost surely, 2^111280681 is an apocalyptic number.

It is an amenable number.

111280681 is a deficient number, since it is larger than the sum of its proper divisors (1).

111280681 is an equidigital number, since it uses as much as digits as its factorization.

111280681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 111280681 is about 10548.9658734873. The cubic root of 111280681 is about 480.9942945628.

The spelling of 111280681 in words is "one hundred eleven million, two hundred eighty thousand, six hundred eighty-one".