111121117 has 2 divisors, whose sum is σ = 111121118. Its totient is φ = 111121116.

The previous prime is 111121097. The next prime is 111121121. The reversal of 111121117 is 711121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107931321 + 3189796 = 10389^2 + 1786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111121117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111121117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111122117) 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, 55560558 + 55560559.

It is an arithmetic number, because the mean of its divisors is an integer number (55560559).

Almost surely, 2^111121117 is an apocalyptic number.

It is an amenable number.

111121117 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121117 is an equidigital number, since it uses as much as digits as its factorization.

111121117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14, while the sum is 16.

The square root of 111121117 is about 10541.4001441934. The cubic root of 111121117 is about 480.7642873249.

Adding to 111121117 its reverse (711121111), we get a palindrome (822242228).

The spelling of 111121117 in words is "one hundred eleven million, one hundred twenty-one thousand, one hundred seventeen".