1123122105 has 80 divisors (see below), whose sum is σ = 2350149120. Its totient is φ = 502443648.

The previous prime is 1123122101. The next prime is 1123122109. The reversal of 1123122105 is 5012213211.

It is an interprime number because it is at equal distance from previous prime (1123122101) and next prime (1123122109).

It is not a de Polignac number, because 1123122105 - 2² = 1123122101 is a prime.

It is a super-2 number, since 2×1123122105² = 2522806525479262050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123122101) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 129031 + ... + 137459.

It is an arithmetic number, because the mean of its divisors is an integer number (29376864).

Almost surely, 2^1123122105 is an apocalyptic number.

1123122105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123122105 is an abundant number, since it is smaller than the sum of its proper divisors (1227027015).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123122105 is an equidigital number, since it uses as much as digits as its factorization.

1123122105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500 (or 8491 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1123122105 is about 33513.0139647272. The cubic root of 1123122105 is about 1039.4628960476.

Adding to 1123122105 its reverse (5012213211), we get a palindrome (6135335316).

The spelling of 1123122105 in words is "one billion, one hundred twenty-three million, one hundred twenty-two thousand, one hundred five".