12132121323 has 16 divisors (see below), whose sum is σ = 18546116096. Its totient is φ = 6910488000.

The previous prime is 12132121291. The next prime is 12132121361. The reversal of 12132121323 is 32312123121.

It is not a de Polignac number, because 12132121323 - 2⁵ = 12132121291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12132121323.

It is not an unprimeable number, because it can be changed into a prime (12132121363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 916303 + ... + 929448.

It is an arithmetic number, because the mean of its divisors is an integer number (1159132256).

Almost surely, 2^12132121323 is an apocalyptic number.

12132121323 is a deficient number, since it is larger than the sum of its proper divisors (6413994773).

12132121323 is a wasteful number, since it uses less digits than its factorization.

12132121323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846074.

The product of its digits is 432, while the sum is 21.

Adding to 12132121323 its reverse (32312123121), we get a palindrome (44444244444).

The spelling of 12132121323 in words is "twelve billion, one hundred thirty-two million, one hundred twenty-one thousand, three hundred twenty-three".