123534540112 has 20 divisors (see below), whose sum is σ = 247601557620. Its totient is φ = 59637363968.

The previous prime is 123534540091. The next prime is 123534540211. The reversal of 123534540112 is 211045435321.

It can be written as a sum of positive squares in 2 ways, for example, as 48313798416 + 75220741696 = 219804^2 + 274264^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133118653 + ... + 133119580.

It is an arithmetic number, because the mean of its divisors is an integer number (12380077881).

Almost surely, 2^123534540112 is an apocalyptic number.

It is an amenable number.

123534540112 is an abundant number, since it is smaller than the sum of its proper divisors (124067017508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123534540112 is a wasteful number, since it uses less digits than its factorization.

123534540112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266238270 (or 266238264 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 123534540112 its reverse (211045435321), we get a palindrome (334579975433).

The spelling of 123534540112 in words is "one hundred twenty-three billion, five hundred thirty-four million, five hundred forty thousand, one hundred twelve".