12267605291 has 4 divisors (see below), whose sum is σ = 12289165800. Its totient is φ = 12246044784.

The previous prime is 12267605279. The next prime is 12267605299. The reversal of 12267605291 is 19250676221.

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

It is a cyclic number.

It is not a de Polignac number, because 12267605291 - 2¹⁰ = 12267604267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12267605299) 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 3 ways as a sum of consecutive naturals, for example, 10779401 + ... + 10780538.

It is an arithmetic number, because the mean of its divisors is an integer number (3072291450).

Almost surely, 2^12267605291 is an apocalyptic number.

12267605291 is a deficient number, since it is larger than the sum of its proper divisors (21560509).

12267605291 is an equidigital number, since it uses as much as digits as its factorization.

12267605291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21560508.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 12267605291 in words is "twelve billion, two hundred sixty-seven million, six hundred five thousand, two hundred ninety-one".