12911358329 has 4 divisors (see below), whose sum is σ = 12952088484. Its totient is φ = 12870628176.

The previous prime is 12911358319. The next prime is 12911358349. The reversal of 12911358329 is 92385311921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2059344400 + 10852013929 = 45380^2 + 104173^2 .

It is a cyclic number.

It is not a de Polignac number, because 12911358329 - 2¹² = 12911354233 is a prime.

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 12911358329.

It is not an unprimeable number, because it can be changed into a prime (12911358319) 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, 20364602 + ... + 20365235.

It is an arithmetic number, because the mean of its divisors is an integer number (3238022121).

Almost surely, 2^12911358329 is an apocalyptic number.

It is an amenable number.

12911358329 is a deficient number, since it is larger than the sum of its proper divisors (40730155).

12911358329 is an equidigital number, since it uses as much as digits as its factorization.

12911358329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40730154.

The product of its digits is 116640, while the sum is 44.

The spelling of 12911358329 in words is "twelve billion, nine hundred eleven million, three hundred fifty-eight thousand, three hundred twenty-nine".