111105611405281 has 2 divisors, whose sum is σ = 111105611405282. Its totient is φ = 111105611405280.

The previous prime is 111105611405221. The next prime is 111105611405293. The reversal of 111105611405281 is 182504116501111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94524264524881 + 16581346880400 = 9722359^2 + 4072020^2 .

It is a cyclic number.

It is not a de Polignac number, because 111105611405281 - 2¹³ = 111105611397089 is a prime.

It is a super-2 number, since 2×111105611405281² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111105611405281.

It is not a weakly prime, because it can be changed into another prime (111105611405221) 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, 55552805702640 + 55552805702641.

It is an arithmetic number, because the mean of its divisors is an integer number (55552805702641).

Almost surely, 2^{111105611405281} is an apocalyptic number.

It is an amenable number.

111105611405281 is a deficient number, since it is larger than the sum of its proper divisors (1).

111105611405281 is an equidigital number, since it uses as much as digits as its factorization.

111105611405281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 37.

Adding to 111105611405281 its reverse (182504116501111), we get a palindrome (293609727906392).

The spelling of 111105611405281 in words is "one hundred eleven trillion, one hundred five billion, six hundred eleven million, four hundred five thousand, two hundred eighty-one".