12321012134 has 4 divisors (see below), whose sum is σ = 18481518204. Its totient is φ = 6160506066.

The previous prime is 12321012133. The next prime is 12321012167. The reversal of 12321012134 is 43121012321.

12321012134 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43121012321 = 79 ⋅545835599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321012133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3080253032 + ... + 3080253035.

It is an arithmetic number, because the mean of its divisors is an integer number (4620379551).

Almost surely, 2^12321012134 is an apocalyptic number.

12321012134 is a deficient number, since it is larger than the sum of its proper divisors (6160506070).

12321012134 is an equidigital number, since it uses as much as digits as its factorization.

12321012134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160506069.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12321012134 its reverse (43121012321), we get a palindrome (55442024455).

The spelling of 12321012134 in words is "twelve billion, three hundred twenty-one million, twelve thousand, one hundred thirty-four".