111068272781 has 2 divisors, whose sum is σ = 111068272782. Its totient is φ = 111068272780.

The previous prime is 111068272771. The next prime is 111068272801. The reversal of 111068272781 is 187272860111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109875675625 + 1192597156 = 331475^2 + 34534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111068272781 is a prime.

It is a super-2 number, since 2×111068272781² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111068272771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55534136390 + 55534136391.

It is an arithmetic number, because the mean of its divisors is an integer number (55534136391).

Almost surely, 2^111068272781 is an apocalyptic number.

It is an amenable number.

111068272781 is a deficient number, since it is larger than the sum of its proper divisors (1).

111068272781 is an equidigital number, since it uses as much as digits as its factorization.

111068272781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 44.

The spelling of 111068272781 in words is "one hundred eleven billion, sixty-eight million, two hundred seventy-two thousand, seven hundred eighty-one".