12320000191 has 4 divisors (see below), whose sum is σ = 12717419584. Its totient is φ = 11922580800.

The previous prime is 12320000179. The next prime is 12320000201. The reversal of 12320000191 is 19100002321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19100002321 = 71023 ⋅268927.

It is a cyclic number.

It is not a de Polignac number, because 12320000191 - 2¹¹ = 12319998143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320000491) 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, 198709650 + ... + 198709711.

It is an arithmetic number, because the mean of its divisors is an integer number (3179354896).

Almost surely, 2^12320000191 is an apocalyptic number.

12320000191 is a deficient number, since it is larger than the sum of its proper divisors (397419393).

12320000191 is an equidigital number, since it uses as much as digits as its factorization.

12320000191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397419392.

The product of its (nonzero) digits is 108, while the sum is 19.

The spelling of 12320000191 in words is "twelve billion, three hundred twenty million, one hundred ninety-one", and thus it is an aban number.