11111001061 has 2 divisors, whose sum is σ = 11111001062. Its totient is φ = 11111001060.

The previous prime is 11111001053. The next prime is 11111001149. The reversal of 11111001061 is 16010011111.

11111001061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10843056900 + 267944161 = 104130^2 + 16369^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111001061 - 2³ = 11111001053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111001361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555500530 + 5555500531.

It is an arithmetic number, because the mean of its divisors is an integer number (5555500531).

Almost surely, 2^11111001061 is an apocalyptic number.

It is an amenable number.

11111001061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111001061 is an equidigital number, since it uses as much as digits as its factorization.

11111001061 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 13.

Adding to 11111001061 its reverse (16010011111), we get a palindrome (27121012172).

The spelling of 11111001061 in words is "eleven billion, one hundred eleven million, one thousand, sixty-one".