111226289 has 2 divisors, whose sum is σ = 111226290. Its totient is φ = 111226288.

The previous prime is 111226211. The next prime is 111226307. The reversal of 111226289 is 982622111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111091600 + 134689 = 10540^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 111226289 - 2¹² = 111222193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111226789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55613144 + 55613145.

It is an arithmetic number, because the mean of its divisors is an integer number (55613145).

Almost surely, 2^111226289 is an apocalyptic number.

It is an amenable number.

111226289 is a deficient number, since it is larger than the sum of its proper divisors (1).

111226289 is an equidigital number, since it uses as much as digits as its factorization.

111226289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 111226289 is about 10546.3874857697. The cubic root of 111226289 is about 480.9159146645.

The spelling of 111226289 in words is "one hundred eleven million, two hundred twenty-six thousand, two hundred eighty-nine".