111540101 has 2 divisors, whose sum is σ = 111540102. Its totient is φ = 111540100.

The previous prime is 111540083. The next prime is 111540103. The reversal of 111540101 is 101045111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87871876 + 23668225 = 9374^2 + 4865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111540101 is a prime.

It is a Sophie Germain prime.

Together with 111540103, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111540103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55770050 + 55770051.

It is an arithmetic number, because the mean of its divisors is an integer number (55770051).

Almost surely, 2^111540101 is an apocalyptic number.

It is an amenable number.

111540101 is a deficient number, since it is larger than the sum of its proper divisors (1).

111540101 is an equidigital number, since it uses as much as digits as its factorization.

111540101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 111540101 is about 10561.2547076567. The cubic root of 111540101 is about 481.3677726940.

Adding to 111540101 its reverse (101045111), we get a palindrome (212585212).

The spelling of 111540101 in words is "one hundred eleven million, five hundred forty thousand, one hundred one".