12031111 has 2 divisors, whose sum is σ = 12031112. Its totient is φ = 12031110.

The previous prime is 12031079. The next prime is 12031133. The reversal of 12031111 is 11113021.

It is a strong prime.

It is an emirp because it is prime and its reverse (11113021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12031111 - 2⁵ = 12031079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031141) by changing a digit.

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 as a sum of consecutive naturals, namely, 6015555 + 6015556.

It is an arithmetic number, because the mean of its divisors is an integer number (6015556).

Almost surely, 2^12031111 is an apocalyptic number.

12031111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031111 is an equidigital number, since it uses as much as digits as its factorization.

12031111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 12031111 is about 3468.5891944709. The cubic root of 12031111 is about 229.1405289124.

Adding to 12031111 its reverse (11113021), we get a palindrome (23144132).

The spelling of 12031111 in words is "twelve million, thirty-one thousand, one hundred eleven".