111229 has 2 divisors, whose sum is σ = 111230. Its totient is φ = 111228.

The previous prime is 111227. The next prime is 111253. The reversal of 111229 is 922111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96100 + 15129 = 310^2 + 123^2 .

It is a cyclic number.

It is not a de Polignac number, because 111229 - 2¹ = 111227 is a prime.

Together with 111227, it forms a pair of twin primes.

It is equal to p₁₀₅₅₅ and since 111229 and 10555 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111227) 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, 55614 + 55615.

It is an arithmetic number, because the mean of its divisors is an integer number (55615).

2¹¹¹²²⁹ is an apocalyptic number.

It is an amenable number.

111229 is a deficient number, since it is larger than the sum of its proper divisors (1).

111229 is an equidigital number, since it uses as much as digits as its factorization.

111229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36, while the sum is 16.

The square root of 111229 is about 333.5101197865. The cubic root of 111229 is about 48.0919821872.

The spelling of 111229 in words is "one hundred eleven thousand, two hundred twenty-nine".