12123201240134 has 32 divisors (see below), whose sum is σ = 18695219558400. Its totient is φ = 5894454252960.

The previous prime is 12123201240133. The next prime is 12123201240181. The reversal of 12123201240134 is 43104210232121.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123201240133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 768479 + ... + 4983669.

It is an arithmetic number, because the mean of its divisors is an integer number (584225611200).

Almost surely, 2^{12123201240134} is an apocalyptic number.

12123201240134 is a deficient number, since it is larger than the sum of its proper divisors (6572018318266).

12123201240134 is a wasteful number, since it uses less digits than its factorization.

12123201240134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4215548.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 12123201240134 its reverse (43104210232121), we get a palindrome (55227411472255).

The spelling of 12123201240134 in words is "twelve trillion, one hundred twenty-three billion, two hundred one million, two hundred forty thousand, one hundred thirty-four".