12109711 has 4 divisors (see below), whose sum is σ = 12138112. Its totient is φ = 12081312.

The previous prime is 12109697. The next prime is 12109817. The reversal of 12109711 is 11790121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11790121 = 7 ⋅1684303.

It is a cyclic number.

It is not a de Polignac number, because 12109711 - 2⁵ = 12109679 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 (12109411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13551 + ... + 14416.

It is an arithmetic number, because the mean of its divisors is an integer number (3034528).

Almost surely, 2^12109711 is an apocalyptic number.

12109711 is a deficient number, since it is larger than the sum of its proper divisors (28401).

12109711 is an equidigital number, since it uses as much as digits as its factorization.

12109711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28400.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 12109711 is about 3479.9010043391. The cubic root of 12109711 is about 229.6384426459.

Adding to 12109711 its reverse (11790121), we get a palindrome (23899832).

The spelling of 12109711 in words is "twelve million, one hundred nine thousand, seven hundred eleven".