111231233 has 2 divisors, whose sum is σ = 111231234. Its totient is φ = 111231232.

The previous prime is 111231209. The next prime is 111231247. The reversal of 111231233 is 332132111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109348849 + 1882384 = 10457^2 + 1372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111231233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111231283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615616 + 55615617.

It is an arithmetic number, because the mean of its divisors is an integer number (55615617).

Almost surely, 2^111231233 is an apocalyptic number.

It is an amenable number.

111231233 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231233 is an equidigital number, since it uses as much as digits as its factorization.

111231233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 17.

The square root of 111231233 is about 10546.6218762218. The cubic root of 111231233 is about 480.9230401174.

Adding to 111231233 its reverse (332132111), we get a palindrome (443363344).

The spelling of 111231233 in words is "one hundred eleven million, two hundred thirty-one thousand, two hundred thirty-three".