11111111010611 has 2 divisors, whose sum is σ = 11111111010612. Its totient is φ = 11111111010610.

The previous prime is 11111111010589. The next prime is 11111111010617. The reversal of 11111111010611 is 11601011111111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111111010611 - 2¹⁴ = 11111110994227 is a prime.

It is a super-3 number, since 3×11111111010611³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11111111010611.

It is not a weakly prime, because it can be changed into another prime (11111111010617) 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, 5555555505305 + 5555555505306.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555505306).

Almost surely, 2^{11111111010611} is an apocalyptic number.

11111111010611 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111111010611 is an equidigital number, since it uses as much as digits as its factorization.

11111111010611 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 17.

Adding to 11111111010611 its reverse (11601011111111), we get a palindrome (22712122121722).

The spelling of 11111111010611 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, ten thousand, six hundred eleven".