1123100505 has 16 divisors (see below), whose sum is σ = 1996623360. Its totient is φ = 598986864.

The previous prime is 1123100491. The next prime is 1123100509. The reversal of 1123100505 is 5050013211.

It is not a de Polignac number, because 1123100505 - 2⁹ = 1123099993 is a prime.

It is a super-2 number, since 2×1123100505² = 2522709488662510050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123100509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4159497 + ... + 4159766.

It is an arithmetic number, because the mean of its divisors is an integer number (124788960).

Almost surely, 2^1123100505 is an apocalyptic number.

1123100505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123100505 is a deficient number, since it is larger than the sum of its proper divisors (873522855).

1123100505 is an equidigital number, since it uses as much as digits as its factorization.

1123100505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8319277 (or 8319271 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1123100505 is about 33512.6917003096. The cubic root of 1123100505 is about 1039.4562323191.

Adding to 1123100505 its reverse (5050013211), we get a palindrome (6173113716).

The spelling of 1123100505 in words is "one billion, one hundred twenty-three million, one hundred thousand, five hundred five".