12071811 has 4 divisors (see below), whose sum is σ = 16095752. Its totient is φ = 8047872.

The previous prime is 12071797. The next prime is 12071827. The reversal of 12071811 is 11817021.

12071811 is digitally balanced in base 3, 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 is not a de Polignac number, because 12071811 - 2⁵ = 12071779 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (12071611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011966 + ... + 2011971.

It is an arithmetic number, because the mean of its divisors is an integer number (4023938).

Almost surely, 2^12071811 is an apocalyptic number.

12071811 is a deficient number, since it is larger than the sum of its proper divisors (4023941).

12071811 is an equidigital number, since it uses as much as digits as its factorization.

12071811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023940.

The product of its (nonzero) digits is 112, while the sum is 21.

The square root of 12071811 is about 3474.4511796829. The cubic root of 12071811 is about 229.3986243044.

Adding to 12071811 its reverse (11817021), we get a palindrome (23888832).

The spelling of 12071811 in words is "twelve million, seventy-one thousand, eight hundred eleven".