12132312321 has 16 divisors (see below), whose sum is σ = 16628226048. Its totient is φ = 7862688000.

The previous prime is 12132312319. The next prime is 12132312341. The reversal of 12132312321 is 12321323121.

It is not a de Polignac number, because 12132312321 - 2¹ = 12132312319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12132312341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80281 + ... + 175241.

It is an arithmetic number, because the mean of its divisors is an integer number (1039264128).

Almost surely, 2^12132312321 is an apocalyptic number.

It is an amenable number.

12132312321 is a deficient number, since it is larger than the sum of its proper divisors (4495913727).

12132312321 is a wasteful number, since it uses less digits than its factorization.

12132312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96152.

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

Adding to 12132312321 its reverse (12321323121), we get a palindrome (24453635442).

The spelling of 12132312321 in words is "twelve billion, one hundred thirty-two million, three hundred twelve thousand, three hundred twenty-one".