1123430420129 has 2 divisors, whose sum is σ = 1123430420130. Its totient is φ = 1123430420128.

The previous prime is 1123430420089. The next prime is 1123430420179. The reversal of 1123430420129 is 9210240343211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1115087424529 + 8342995600 = 1055977^2 + 91340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123430420129 - 2⁸ = 1123430419873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123430420095 and 1123430420104.

It is not a weakly prime, because it can be changed into another prime (1123430420179) 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, 561715210064 + 561715210065.

It is an arithmetic number, because the mean of its divisors is an integer number (561715210065).

Almost surely, 2^{1123430420129} is an apocalyptic number.

It is an amenable number.

1123430420129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123430420129 is an equidigital number, since it uses as much as digits as its factorization.

1123430420129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 1123430420129 in words is "one trillion, one hundred twenty-three billion, four hundred thirty million, four hundred twenty thousand, one hundred twenty-nine".