111216233 has 2 divisors, whose sum is σ = 111216234. Its totient is φ = 111216232.

The previous prime is 111216229. The next prime is 111216277. The reversal of 111216233 is 332612111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77668969 + 33547264 = 8813^2 + 5792^2 .

It is a cyclic number.

It is not a de Polignac number, because 111216233 - 2² = 111216229 is a prime.

It is not a weakly prime, because it can be changed into another prime (111236233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55608116 + 55608117.

It is an arithmetic number, because the mean of its divisors is an integer number (55608117).

Almost surely, 2^111216233 is an apocalyptic number.

It is an amenable number.

111216233 is a deficient number, since it is larger than the sum of its proper divisors (1).

111216233 is an equidigital number, since it uses as much as digits as its factorization.

111216233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 111216233 is about 10545.9107240674. The cubic root of 111216233 is about 480.9014209801.

Adding to 111216233 its reverse (332612111), we get a palindrome (443828344).

The spelling of 111216233 in words is "one hundred eleven million, two hundred sixteen thousand, two hundred thirty-three".