111540123193 has 2 divisors, whose sum is σ = 111540123194. Its totient is φ = 111540123192.

The previous prime is 111540123161. The next prime is 111540123293. The reversal of 111540123193 is 391321045111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104863925929 + 6676197264 = 323827^2 + 81708^2 .

It is a cyclic number.

It is not a de Polignac number, because 111540123193 - 2⁵ = 111540123161 is a prime.

It is not a weakly prime, because it can be changed into another prime (111540123113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55770061596 + 55770061597.

It is an arithmetic number, because the mean of its divisors is an integer number (55770061597).

Almost surely, 2^111540123193 is an apocalyptic number.

It is an amenable number.

111540123193 is a deficient number, since it is larger than the sum of its proper divisors (1).

111540123193 is an equidigital number, since it uses as much as digits as its factorization.

111540123193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 111540123193 in words is "one hundred eleven billion, five hundred forty million, one hundred twenty-three thousand, one hundred ninety-three".