11123345556601 has 2 divisors, whose sum is σ = 11123345556602. Its totient is φ = 11123345556600.

The previous prime is 11123345556571. The next prime is 11123345556737. The reversal of 11123345556601 is 10665554332111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8003812468201 + 3119533088400 = 2829101^2 + 1766220^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123345556601 - 2¹¹ = 11123345554553 is a prime.

It is not a weakly prime, because it can be changed into another prime (11123345556101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561672778300 + 5561672778301.

It is an arithmetic number, because the mean of its divisors is an integer number (5561672778301).

Almost surely, 2^{11123345556601} is an apocalyptic number.

It is an amenable number.

11123345556601 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123345556601 is an equidigital number, since it uses as much as digits as its factorization.

11123345556601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 43.

Adding to 11123345556601 its reverse (10665554332111), we get a palindrome (21788899888712).

The spelling of 11123345556601 in words is "eleven trillion, one hundred twenty-three billion, three hundred forty-five million, five hundred fifty-six thousand, six hundred one".