123534540111 has 4 divisors (see below), whose sum is σ = 164712720152. Its totient is φ = 82356360072.

The previous prime is 123534540091. The next prime is 123534540211. The reversal of 123534540111 is 111045435321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111045435321 = 3 ⋅37015145107.

It is not a de Polignac number, because 123534540111 - 2⁷ = 123534539983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123534540211) 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 in 3 ways as a sum of consecutive naturals, for example, 20589090016 + ... + 20589090021.

It is an arithmetic number, because the mean of its divisors is an integer number (41178180038).

Almost surely, 2^123534540111 is an apocalyptic number.

123534540111 is a deficient number, since it is larger than the sum of its proper divisors (41178180041).

123534540111 is an equidigital number, since it uses as much as digits as its factorization.

123534540111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41178180040.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 123534540111 its reverse (111045435321), we get a palindrome (234579975432).

The spelling of 123534540111 in words is "one hundred twenty-three billion, five hundred thirty-four million, five hundred forty thousand, one hundred eleven".