1123123105 has 16 divisors (see below), whose sum is σ = 1536799824. Its totient is φ = 780595200.

The previous prime is 1123123081. The next prime is 1123123213. The reversal of 1123123105 is 5013213211.

It can be written as a sum of positive squares in 8 ways, for example, as 26718561 + 1096404544 = 5169^2 + 33112^2 .

It is not a de Polignac number, because 1123123105 - 2¹⁹ = 1122598817 is a prime.

It is a super-2 number, since 2×1123123105² = 2522811017969682050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507096 + ... + 509305.

It is an arithmetic number, because the mean of its divisors is an integer number (96049989).

Almost surely, 2^1123123105 is an apocalyptic number.

It is an amenable number.

1123123105 is a deficient number, since it is larger than the sum of its proper divisors (413676719).

1123123105 is a wasteful number, since it uses less digits than its factorization.

1123123105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016436.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1123123105 is about 33513.0288843011. The cubic root of 1123123105 is about 1039.4632045515.

Adding to 1123123105 its reverse (5013213211), we get a palindrome (6136336316).

The spelling of 1123123105 in words is "one billion, one hundred twenty-three million, one hundred twenty-three thousand, one hundred five".