111215136289 has 2 divisors, whose sum is σ = 111215136290. Its totient is φ = 111215136288.

The previous prime is 111215136287. The next prime is 111215136343. The reversal of 111215136289 is 982631512111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94700830225 + 16514306064 = 307735^2 + 128508^2 .

It is a cyclic number.

It is not a de Polignac number, because 111215136289 - 2¹ = 111215136287 is a prime.

Together with 111215136287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (111215136287) 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, 55607568144 + 55607568145.

It is an arithmetic number, because the mean of its divisors is an integer number (55607568145).

Almost surely, 2^111215136289 is an apocalyptic number.

It is an amenable number.

111215136289 is a deficient number, since it is larger than the sum of its proper divisors (1).

111215136289 is an equidigital number, since it uses as much as digits as its factorization.

111215136289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 40.

The spelling of 111215136289 in words is "one hundred eleven billion, two hundred fifteen million, one hundred thirty-six thousand, two hundred eighty-nine".