12906508136321 has 4 divisors (see below), whose sum is σ = 12919531858944. Its totient is φ = 12893484413700.

The previous prime is 12906508136281. The next prime is 12906508136323. The reversal of 12906508136321 is 12363180560921.

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 12906508136321 - 2⁶ = 12906508136257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12906508136323) 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, 6511859825 + ... + 6511861806.

It is an arithmetic number, because the mean of its divisors is an integer number (3229882964736).

Almost surely, 2^{12906508136321} is an apocalyptic number.

It is an amenable number.

12906508136321 is a deficient number, since it is larger than the sum of its proper divisors (13023722623).

12906508136321 is an equidigital number, since it uses as much as digits as its factorization.

12906508136321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13023722622.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 12906508136321 in words is "twelve trillion, nine hundred six billion, five hundred eight million, one hundred thirty-six thousand, three hundred twenty-one".