111266548781 has 2 divisors, whose sum is σ = 111266548782. Its totient is φ = 111266548780.

The previous prime is 111266548741. The next prime is 111266548787. The reversal of 111266548781 is 187845662111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91706008900 + 19560539881 = 302830^2 + 139859^2 .

It is an emirp because it is prime and its reverse (187845662111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111266548781 is a prime.

It is a super-2 number, since 2×111266548781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111266548787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55633274390 + 55633274391.

It is an arithmetic number, because the mean of its divisors is an integer number (55633274391).

Almost surely, 2^111266548781 is an apocalyptic number.

It is an amenable number.

111266548781 is a deficient number, since it is larger than the sum of its proper divisors (1).

111266548781 is an equidigital number, since it uses as much as digits as its factorization.

111266548781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 50.

The spelling of 111266548781 in words is "one hundred eleven billion, two hundred sixty-six million, five hundred forty-eight thousand, seven hundred eighty-one".