111111361 has 2 divisors, whose sum is σ = 111111362. Its totient is φ = 111111360.

The previous prime is 111111359. The next prime is 111111391. The reversal of 111111361 is 163111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79121025 + 31990336 = 8895^2 + 5656^2 .

It is an emirp because it is prime and its reverse (163111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111111361 - 2¹ = 111111359 is a prime.

Together with 111111359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111111331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555680 + 55555681.

It is an arithmetic number, because the mean of its divisors is an integer number (55555681).

Almost surely, 2^111111361 is an apocalyptic number.

It is an amenable number.

111111361 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111361 is an equidigital number, since it uses as much as digits as its factorization.

111111361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18, while the sum is 16.

The square root of 111111361 is about 10540.9373871587. The cubic root of 111111361 is about 480.7502171710.

Adding to 111111361 its reverse (163111111), we get a palindrome (274222472).

The spelling of 111111361 in words is "one hundred eleven million, one hundred eleven thousand, three hundred sixty-one".