10805111 has 2 divisors, whose sum is σ = 10805112. Its totient is φ = 10805110.

The previous prime is 10805089. The next prime is 10805117. The reversal of 10805111 is 11150801.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10805111 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10805111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10805117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5402555 + 5402556.

It is an arithmetic number, because the mean of its divisors is an integer number (5402556).

Almost surely, 2^10805111 is an apocalyptic number.

10805111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10805111 is an equidigital number, since it uses as much as digits as its factorization.

10805111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

The square root of 10805111 is about 3287.1128669396. The cubic root of 10805111 is about 221.0767530953.

Adding to 10805111 its reverse (11150801), we get a palindrome (21955912).

The spelling of 10805111 in words is "ten million, eight hundred five thousand, one hundred eleven".