111323221 has 2 divisors, whose sum is σ = 111323222. Its totient is φ = 111323220.

The previous prime is 111323207. The next prime is 111323227. The reversal of 111323221 is 122323111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56415121 + 54908100 = 7511^2 + 7410^2 .

It is a cyclic number.

It is not a de Polignac number, because 111323221 - 2⁵ = 111323189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111323195 and 111323204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111323227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55661610 + 55661611.

It is an arithmetic number, because the mean of its divisors is an integer number (55661611).

Almost surely, 2^111323221 is an apocalyptic number.

It is an amenable number.

111323221 is a deficient number, since it is larger than the sum of its proper divisors (1).

111323221 is an equidigital number, since it uses as much as digits as its factorization.

111323221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 16.

The square root of 111323221 is about 10550.9819922129. The cubic root of 111323221 is about 481.0555777084.

Adding to 111323221 its reverse (122323111), we get a palindrome (233646332).

The spelling of 111323221 in words is "one hundred eleven million, three hundred twenty-three thousand, two hundred twenty-one".