12081111 has 16 divisors (see below), whose sum is σ = 18713088. Its totient is φ = 6789600.

The previous prime is 12081073. The next prime is 12081119. The reversal of 12081111 is 11118021.

It is not a de Polignac number, because 12081111 - 2⁷ = 12080983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12081119) 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, 3435 + ... + 5996.

It is an arithmetic number, because the mean of its divisors is an integer number (1169568).

Almost surely, 2^12081111 is an apocalyptic number.

12081111 is a deficient number, since it is larger than the sum of its proper divisors (6631977).

12081111 is an equidigital number, since it uses as much as digits as its factorization.

12081111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9502.

The product of its (nonzero) digits is 16, while the sum is 15.

The square root of 12081111 is about 3475.7892628869. The cubic root of 12081111 is about 229.4575179697.

Adding to 12081111 its reverse (11118021), we get a palindrome (23199132).

The spelling of 12081111 in words is "twelve million, eighty-one thousand, one hundred eleven".