12131320123321 has 4 divisors (see below), whose sum is σ = 13864365855232. Its totient is φ = 10398274391412.

The previous prime is 12131320123283. The next prime is 12131320123331. The reversal of 12131320123321 is 12332102313121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12131320123321 - 2¹⁷ = 12131319992249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131320123331) 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, 866522865945 + ... + 866522865958.

It is an arithmetic number, because the mean of its divisors is an integer number (3466091463808).

Almost surely, 2^{12131320123321} is an apocalyptic number.

It is an amenable number.

12131320123321 is a deficient number, since it is larger than the sum of its proper divisors (1733045731911).

12131320123321 is an equidigital number, since it uses as much as digits as its factorization.

12131320123321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733045731910.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 12131320123321 its reverse (12332102313121), we get a palindrome (24463422436442).

The spelling of 12131320123321 in words is "twelve trillion, one hundred thirty-one billion, three hundred twenty million, one hundred twenty-three thousand, three hundred twenty-one".