11161111 has 16 divisors (see below), whose sum is σ = 12446784. Its totient is φ = 9944064.

The previous prime is 11161097. The next prime is 11161127. The reversal of 11161111 is 11116111.

11161111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11161111 - 2⁷ = 11160983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11161091 and 11161100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11161181) 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, 66750 + ... + 66916.

It is an arithmetic number, because the mean of its divisors is an integer number (777924).

Almost surely, 2^11161111 is an apocalyptic number.

11161111 is a deficient number, since it is larger than the sum of its proper divisors (1285673).

11161111 is a wasteful number, since it uses less digits than its factorization.

11161111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

The product of its digits is 6, while the sum is 13.

The square root of 11161111 is about 3340.8248981352. The cubic root of 11161111 is about 223.4785316042.

Adding to 11161111 its reverse (11116111), we get a palindrome (22277222).

The spelling of 11161111 in words is "eleven million, one hundred sixty-one thousand, one hundred eleven".