12105522134123 has 32 divisors (see below), whose sum is σ = 13662808642560. Its totient is φ = 10630203816960.

The previous prime is 12105522134089. The next prime is 12105522134171. The reversal of 12105522134123 is 32143122550121.

It is a cyclic number.

It is not a de Polignac number, because 12105522134123 - 2¹² = 12105522130027 is a prime.

It is a super-2 number, since 2×12105522134123² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12105522134123.

It is not an unprimeable number, because it can be changed into a prime (12105522134183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60784673 + ... + 60983501.

It is an arithmetic number, because the mean of its divisors is an integer number (426962770080).

Almost surely, 2^{12105522134123} is an apocalyptic number.

12105522134123 is a deficient number, since it is larger than the sum of its proper divisors (1557286508437).

12105522134123 is a wasteful number, since it uses less digits than its factorization.

12105522134123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200307.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 12105522134123 its reverse (32143122550121), we get a palindrome (44248644684244).

The spelling of 12105522134123 in words is "twelve trillion, one hundred five billion, five hundred twenty-two million, one hundred thirty-four thousand, one hundred twenty-three".