1123430420209 has 2 divisors, whose sum is σ = 1123430420210. Its totient is φ = 1123430420208.

The previous prime is 1123430420197. The next prime is 1123430420243. The reversal of 1123430420209 is 9020240343211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 818011713600 + 305418706609 = 904440^2 + 552647^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123430420209 - 2²⁷ = 1123296202481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1123430424209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561715210104 + 561715210105.

It is an arithmetic number, because the mean of its divisors is an integer number (561715210105).

Almost surely, 2^{1123430420209} is an apocalyptic number.

It is an amenable number.

1123430420209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123430420209 is an equidigital number, since it uses as much as digits as its factorization.

1123430420209 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 31.

The spelling of 1123430420209 in words is "one trillion, one hundred twenty-three billion, four hundred thirty million, four hundred twenty thousand, two hundred nine".