111000191123 has 2 divisors, whose sum is σ = 111000191124. Its totient is φ = 111000191122.

The previous prime is 111000191077. The next prime is 111000191161. The reversal of 111000191123 is 321191000111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111000191123 - 2¹² = 111000187027 is a prime.

It is a super-3 number, since 3×111000191123³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 111000191095 and 111000191104.

It is not a weakly prime, because it can be changed into another prime (111000197123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500095561 + 55500095562.

It is an arithmetic number, because the mean of its divisors is an integer number (55500095562).

Almost surely, 2^111000191123 is an apocalyptic number.

111000191123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111000191123 is an equidigital number, since it uses as much as digits as its factorization.

111000191123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 20.

Adding to 111000191123 its reverse (321191000111), we get a palindrome (432191191234).

The spelling of 111000191123 in words is "one hundred eleven billion, one hundred ninety-one thousand, one hundred twenty-three".