12320877191 has 4 divisors (see below), whose sum is σ = 14081002512. Its totient is φ = 10560751872.

The previous prime is 12320877137. The next prime is 12320877203. The reversal of 12320877191 is 19177802321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19177802321 = 14087 ⋅1361383.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320877191 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 (12320877091) 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, 880062650 + ... + 880062663.

It is an arithmetic number, because the mean of its divisors is an integer number (3520250628).

Almost surely, 2^12320877191 is an apocalyptic number.

12320877191 is a deficient number, since it is larger than the sum of its proper divisors (1760125321).

12320877191 is an equidigital number, since it uses as much as digits as its factorization.

12320877191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760125320.

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 12320877191 in words is "twelve billion, three hundred twenty million, eight hundred seventy-seven thousand, one hundred ninety-one".