123111110543 has 2 divisors, whose sum is σ = 123111110544. Its totient is φ = 123111110542.

The previous prime is 123111110539. The next prime is 123111110623. The reversal of 123111110543 is 345011111321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123111110543 - 2² = 123111110539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123111130543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555555271 + 61555555272.

It is an arithmetic number, because the mean of its divisors is an integer number (61555555272).

Almost surely, 2^123111110543 is an apocalyptic number.

123111110543 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111110543 is an equidigital number, since it uses as much as digits as its factorization.

123111110543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 123111110543 its reverse (345011111321), we get a palindrome (468122221864).

The spelling of 123111110543 in words is "one hundred twenty-three billion, one hundred eleven million, one hundred ten thousand, five hundred forty-three".