111123998057 has 2 divisors, whose sum is σ = 111123998058. Its totient is φ = 111123998056.

The previous prime is 111123998053. The next prime is 111123998081. The reversal of 111123998057 is 750899321111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110397372121 + 726625936 = 332261^2 + 26956^2 .

It is an emirp because it is prime and its reverse (750899321111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111123998057 - 2² = 111123998053 is a prime.

It is not a weakly prime, because it can be changed into another prime (111123998053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561999028 + 55561999029.

It is an arithmetic number, because the mean of its divisors is an integer number (55561999029).

Almost surely, 2^111123998057 is an apocalyptic number.

It is an amenable number.

111123998057 is a deficient number, since it is larger than the sum of its proper divisors (1).

111123998057 is an equidigital number, since it uses as much as digits as its factorization.

111123998057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 47.

The spelling of 111123998057 in words is "one hundred eleven billion, one hundred twenty-three million, nine hundred ninety-eight thousand, fifty-seven".