12181625371 has 4 divisors (see below), whose sum is σ = 12182063152. Its totient is φ = 12181187592.

The previous prime is 12181625293. The next prime is 12181625377. The reversal of 12181625371 is 17352618121.

12181625371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12181625371 - 2¹³ = 12181617179 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 12181625371.

It is not an unprimeable number, because it can be changed into a prime (12181625377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174096 + ... + 233821.

It is an arithmetic number, because the mean of its divisors is an integer number (3045515788).

Almost surely, 2^12181625371 is an apocalyptic number.

12181625371 is a deficient number, since it is larger than the sum of its proper divisors (437781).

12181625371 is an equidigital number, since it uses as much as digits as its factorization.

12181625371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437780.

The product of its digits is 20160, while the sum is 37.

The spelling of 12181625371 in words is "twelve billion, one hundred eighty-one million, six hundred twenty-five thousand, three hundred seventy-one".