123112105 has 8 divisors (see below), whose sum is σ = 152829000. Its totient is φ = 95093376.

The previous prime is 123112103. The next prime is 123112151. The reversal of 123112105 is 501211321.

It can be written as a sum of positive squares in 4 ways, for example, as 257049 + 122855056 = 507^2 + 11084^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123112105 - 2¹ = 123112103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123112103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424380 + ... + 424669.

It is an arithmetic number, because the mean of its divisors is an integer number (19103625).

Almost surely, 2^123112105 is an apocalyptic number.

It is an amenable number.

123112105 is a deficient number, since it is larger than the sum of its proper divisors (29716895).

123112105 is an equidigital number, since it uses as much as digits as its factorization.

123112105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849083.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 123112105 is about 11095.5894390519. The cubic root of 123112105 is about 497.4700267288.

Adding to 123112105 its reverse (501211321), we get a palindrome (624323426).

The spelling of 123112105 in words is "one hundred twenty-three million, one hundred twelve thousand, one hundred five".