111111111329 has 2 divisors, whose sum is σ = 111111111330. Its totient is φ = 111111111328.

The previous prime is 111111111289. The next prime is 111111111337. The reversal of 111111111329 is 923111111111.

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., 84301961104 + 26809150225 = 290348^2 + 163735^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111111329 - 2³² = 106816144033 is a prime.

It is not a weakly prime, because it can be changed into another prime (111111111379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555555664 + 55555555665.

It is an arithmetic number, because the mean of its divisors is an integer number (55555555665).

Almost surely, 2^111111111329 is an apocalyptic number.

It is an amenable number.

111111111329 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111111329 is an equidigital number, since it uses as much as digits as its factorization.

111111111329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54, while the sum is 23.

The spelling of 111111111329 in words is "one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, three hundred twenty-nine".