111430129 has 2 divisors, whose sum is σ = 111430130. Its totient is φ = 111430128.

The previous prime is 111430069. The next prime is 111430141. The reversal of 111430129 is 921034111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95589729 + 15840400 = 9777^2 + 3980^2 .

It is a cyclic number.

It is not a de Polignac number, because 111430129 - 2²⁵ = 77875697 is a prime.

It is not a weakly prime, because it can be changed into another prime (111431129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55715064 + 55715065.

It is an arithmetic number, because the mean of its divisors is an integer number (55715065).

Almost surely, 2^111430129 is an apocalyptic number.

It is an amenable number.

111430129 is a deficient number, since it is larger than the sum of its proper divisors (1).

111430129 is an equidigital number, since it uses as much as digits as its factorization.

111430129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 111430129 is about 10556.0470347569. The cubic root of 111430129 is about 481.2095205397.

The spelling of 111430129 in words is "one hundred eleven million, four hundred thirty thousand, one hundred twenty-nine".