111232129 has 2 divisors, whose sum is σ = 111232130. Its totient is φ = 111232128.

The previous prime is 111232087. The next prime is 111232151. The reversal of 111232129 is 921232111.

It is an a-pointer prime, because the next prime (111232151) can be obtained adding 111232129 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93993025 + 17239104 = 9695^2 + 4152^2 .

It is a cyclic number.

It is not a de Polignac number, because 111232129 - 2¹⁹ = 110707841 is a prime.

It is not a weakly prime, because it can be changed into another prime (111232229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55616064 + 55616065.

It is an arithmetic number, because the mean of its divisors is an integer number (55616065).

Almost surely, 2^111232129 is an apocalyptic number.

It is an amenable number.

111232129 is a deficient number, since it is larger than the sum of its proper divisors (1).

111232129 is an equidigital number, since it uses as much as digits as its factorization.

111232129 is an odious number, because the sum of its binary digits is odd.

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

The square root of 111232129 is about 10546.6643541928. The cubic root of 111232129 is about 480.9243314390.

The spelling of 111232129 in words is "one hundred eleven million, two hundred thirty-two thousand, one hundred twenty-nine".