1123122109 has 2 divisors, whose sum is σ = 1123122110. Its totient is φ = 1123122108.

The previous prime is 1123122101. The next prime is 1123122127. The reversal of 1123122109 is 9012213211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1065696025 + 57426084 = 32645^2 + 7578^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123122109 - 2³ = 1123122101 is a prime.

It is a super-2 number, since 2×1123122109² = 2522806543449215762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123122109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123122101) 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, 561561054 + 561561055.

It is an arithmetic number, because the mean of its divisors is an integer number (561561055).

Almost surely, 2^1123122109 is an apocalyptic number.

It is an amenable number.

1123122109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123122109 is an equidigital number, since it uses as much as digits as its factorization.

1123122109 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1123122109 is about 33513.0140244055. The cubic root of 1123122109 is about 1039.4628972816.

The spelling of 1123122109 in words is "one billion, one hundred twenty-three million, one hundred twenty-two thousand, one hundred nine".