111216229 has 2 divisors, whose sum is σ = 111216230. Its totient is φ = 111216228.

The previous prime is 111216221. The next prime is 111216233. The reversal of 111216229 is 922612111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106131204 + 5085025 = 10302^2 + 2255^2 .

It is a cyclic number.

It is not a de Polignac number, because 111216229 - 2³ = 111216221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111216221) 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, 55608114 + 55608115.

It is an arithmetic number, because the mean of its divisors is an integer number (55608115).

Almost surely, 2^111216229 is an apocalyptic number.

It is an amenable number.

111216229 is a deficient number, since it is larger than the sum of its proper divisors (1).

111216229 is an equidigital number, since it uses as much as digits as its factorization.

111216229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 25.

The square root of 111216229 is about 10545.9105344204. The cubic root of 111216229 is about 480.9014152147.

The spelling of 111216229 in words is "one hundred eleven million, two hundred sixteen thousand, two hundred twenty-nine".