12102105 has 8 divisors (see below), whose sum is σ = 19363392. Its totient is φ = 6454448.

The previous prime is 12102091. The next prime is 12102127. The reversal of 12102105 is 50120121.

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 12102105 - 2¹¹ = 12100057 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403389 + ... + 403418.

It is an arithmetic number, because the mean of its divisors is an integer number (2420424).

Almost surely, 2^12102105 is an apocalyptic number.

12102105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12102105 is a deficient number, since it is larger than the sum of its proper divisors (7261287).

12102105 is an equidigital number, since it uses as much as digits as its factorization.

12102105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806815.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 12102105 is about 3478.8079855031. The cubic root of 12102105 is about 229.5903546333.

Adding to 12102105 its reverse (50120121), we get a palindrome (62222226).

The spelling of 12102105 in words is "twelve million, one hundred two thousand, one hundred five".