1123312109 has 2 divisors, whose sum is σ = 1123312110. Its totient is φ = 1123312108.

The previous prime is 1123312093. The next prime is 1123312121. The reversal of 1123312109 is 9012133211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1031822884 + 91489225 = 32122^2 + 9565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123312109 - 2⁴ = 1123312093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123312159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561656054 + 561656055.

It is an arithmetic number, because the mean of its divisors is an integer number (561656055).

Almost surely, 2^1123312109 is an apocalyptic number.

It is an amenable number.

1123312109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123312109 is an equidigital number, since it uses as much as digits as its factorization.

1123312109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1123312109 is about 33515.8486241957. The cubic root of 1123312109 is about 1039.5215097314.

The spelling of 1123312109 in words is "one billion, one hundred twenty-three million, three hundred twelve thousand, one hundred nine".