12181030205 has 4 divisors (see below), whose sum is σ = 14617236252. Its totient is φ = 9744824160.

The previous prime is 12181030189. The next prime is 12181030223. The reversal of 12181030205 is 50203018121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1406175001 + 10774855204 = 37499^2 + 103802^2 .

It is not a de Polignac number, because 12181030205 - 2⁴ = 12181030189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218103016 + ... + 1218103025.

It is an arithmetic number, because the mean of its divisors is an integer number (3654309063).

Almost surely, 2^12181030205 is an apocalyptic number.

It is an amenable number.

12181030205 is a deficient number, since it is larger than the sum of its proper divisors (2436206047).

12181030205 is an equidigital number, since it uses as much as digits as its factorization.

12181030205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436206046.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 12181030205 its reverse (50203018121), we get a palindrome (62384048326).

The spelling of 12181030205 in words is "twelve billion, one hundred eighty-one million, thirty thousand, two hundred five".