12103511 has 16 divisors (see below), whose sum is σ = 14361600. Its totient is φ = 9985248.

The previous prime is 12103501. The next prime is 12103517. The reversal of 12103511 is 11530121.

It is not a de Polignac number, because 12103511 - 2⁶ = 12103447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103517) 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, 23525 + ... + 24033.

It is an arithmetic number, because the mean of its divisors is an integer number (897600).

Almost surely, 2^12103511 is an apocalyptic number.

12103511 is a deficient number, since it is larger than the sum of its proper divisors (2258089).

12103511 is an equidigital number, since it uses as much as digits as its factorization.

12103511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 12103511 is about 3479.0100603476. The cubic root of 12103511 is about 229.5992454155.

Adding to 12103511 its reverse (11530121), we get a palindrome (23633632).

The spelling of 12103511 in words is "twelve million, one hundred three thousand, five hundred eleven".