111156198508057 has 2 divisors, whose sum is σ = 111156198508058. Its totient is φ = 111156198508056.

The previous prime is 111156198508031. The next prime is 111156198508151. The reversal of 111156198508057 is 750805891651111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109029746276361 + 2126452231696 = 10441731^2 + 1458236^2 .

It is an emirp because it is prime and its reverse (750805891651111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111156198508057 - 2³⁹ = 110606442694169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111156198507992 and 111156198508010.

It is not a weakly prime, because it can be changed into another prime (111156198508357) 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, 55578099254028 + 55578099254029.

It is an arithmetic number, because the mean of its divisors is an integer number (55578099254029).

Almost surely, 2^{111156198508057} is an apocalyptic number.

It is an amenable number.

111156198508057 is a deficient number, since it is larger than the sum of its proper divisors (1).

111156198508057 is an equidigital number, since it uses as much as digits as its factorization.

111156198508057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024000, while the sum is 58.

The spelling of 111156198508057 in words is "one hundred eleven trillion, one hundred fifty-six billion, one hundred ninety-eight million, five hundred eight thousand, fifty-seven".