111099742565557 has 2 divisors, whose sum is σ = 111099742565558. Its totient is φ = 111099742565556.

The previous prime is 111099742565543. The next prime is 111099742565627. The reversal of 111099742565557 is 755565247990111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110725405392996 + 374337172561 = 10522614^2 + 611831^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111099742565557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111099742565492 and 111099742565501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111099742595557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55549871282778 + 55549871282779.

It is an arithmetic number, because the mean of its divisors is an integer number (55549871282779).

Almost surely, 2^{111099742565557} is an apocalyptic number.

It is an amenable number.

111099742565557 is a deficient number, since it is larger than the sum of its proper divisors (1).

111099742565557 is an equidigital number, since it uses as much as digits as its factorization.

111099742565557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 119070000, while the sum is 67.

The spelling of 111099742565557 in words is "one hundred eleven trillion, ninety-nine billion, seven hundred forty-two million, five hundred sixty-five thousand, five hundred fifty-seven".