111112541 has 2 divisors, whose sum is σ = 111112542. Its totient is φ = 111112540.

The previous prime is 111112487. The next prime is 111112571. The reversal of 111112541 is 145211111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82264900 + 28847641 = 9070^2 + 5371^2 .

It is an emirp because it is prime and its reverse (145211111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111112541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111112571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556270 + 55556271.

It is an arithmetic number, because the mean of its divisors is an integer number (55556271).

Almost surely, 2^111112541 is an apocalyptic number.

It is an amenable number.

111112541 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112541 is an equidigital number, since it uses as much as digits as its factorization.

111112541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40, while the sum is 17.

The square root of 111112541 is about 10540.9933592617. The cubic root of 111112541 is about 480.7519190169.

Adding to 111112541 its reverse (145211111), we get a palindrome (256323652).

The spelling of 111112541 in words is "one hundred eleven million, one hundred twelve thousand, five hundred forty-one".