11112111061 has 2 divisors, whose sum is σ = 11112111062. Its totient is φ = 11112111060.

The previous prime is 11112111011. The next prime is 11112111067. The reversal of 11112111061 is 16011121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10398900625 + 713210436 = 101975^2 + 26706^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112111061 - 2¹¹ = 11112109013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112111067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556055530 + 5556055531.

It is an arithmetic number, because the mean of its divisors is an integer number (5556055531).

Almost surely, 2^11112111061 is an apocalyptic number.

It is an amenable number.

11112111061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112111061 is an equidigital number, since it uses as much as digits as its factorization.

11112111061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 11112111061 its reverse (16011121111), we get a palindrome (27123232172).

The spelling of 11112111061 in words is "eleven billion, one hundred twelve million, one hundred eleven thousand, sixty-one".