12120201191 has 4 divisors (see below), whose sum is σ = 13851658512. Its totient is φ = 10388743872.

The previous prime is 12120201157. The next prime is 12120201199. The reversal of 12120201191 is 19110202121.

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 12120201191 - 2⁶ = 12120201127 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 (12120201199) 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, 865728650 + ... + 865728663.

It is an arithmetic number, because the mean of its divisors is an integer number (3462914628).

Almost surely, 2^12120201191 is an apocalyptic number.

12120201191 is a deficient number, since it is larger than the sum of its proper divisors (1731457321).

12120201191 is an equidigital number, since it uses as much as digits as its factorization.

12120201191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731457320.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12120201191 in words is "twelve billion, one hundred twenty million, two hundred one thousand, one hundred ninety-one".