12115105 has 4 divisors (see below), whose sum is σ = 14538132. Its totient is φ = 9692080.

The previous prime is 12115091. The next prime is 12115123. The reversal of 12115105 is 50151121.

12115105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4004001 + 8111104 = 2001^2 + 2848^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12115105 is a prime.

It is a super-2 number, since 2×12115105² = 293551538322050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211506 + ... + 1211515.

It is an arithmetic number, because the mean of its divisors is an integer number (3634533).

Almost surely, 2^12115105 is an apocalyptic number.

It is an amenable number.

12115105 is a deficient number, since it is larger than the sum of its proper divisors (2423027).

12115105 is an equidigital number, since it uses as much as digits as its factorization.

12115105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2423026.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 12115105 is about 3480.6759401013. The cubic root of 12115105 is about 229.6725333546.

Adding to 12115105 its reverse (50151121), we get a palindrome (62266226).

The spelling of 12115105 in words is "twelve million, one hundred fifteen thousand, one hundred five".