12120134243 has 4 divisors (see below), whose sum is σ = 13851582000. Its totient is φ = 10388686488.

The previous prime is 12120134231. The next prime is 12120134249. The reversal of 12120134243 is 34243102121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34243102121 = 23 ⋅1488830527.

It is a cyclic number.

It is not a de Polignac number, because 12120134243 - 2¹² = 12120130147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120134249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865723868 + ... + 865723881.

It is an arithmetic number, because the mean of its divisors is an integer number (3462895500).

Almost surely, 2^12120134243 is an apocalyptic number.

12120134243 is a deficient number, since it is larger than the sum of its proper divisors (1731447757).

12120134243 is an equidigital number, since it uses as much as digits as its factorization.

12120134243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731447756.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12120134243 its reverse (34243102121), we get a palindrome (46363236364).

The spelling of 12120134243 in words is "twelve billion, one hundred twenty million, one hundred thirty-four thousand, two hundred forty-three".