1011161111 has 2 divisors, whose sum is σ = 1011161112. Its totient is φ = 1011161110.

The previous prime is 1011161093. The next prime is 1011161141. The reversal of 1011161111 is 1111611101.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1111611101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011161111 - 2²⁶ = 944052247 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011161141) 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, 505580555 + 505580556.

It is an arithmetic number, because the mean of its divisors is an integer number (505580556).

Almost surely, 2^1011161111 is an apocalyptic number.

1011161111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011161111 is an equidigital number, since it uses as much as digits as its factorization.

1011161111 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 14.

The square root of 1011161111 is about 31798.7595827259. The cubic root of 1011161111 is about 1003.7066143682.

Adding to 1011161111 its reverse (1111611101), we get a palindrome (2122772212).

The spelling of 1011161111 in words is "one billion, eleven million, one hundred sixty-one thousand, one hundred eleven".