12180039481 has 4 divisors (see below), whose sum is σ = 12180291700. Its totient is φ = 12179787264.

The previous prime is 12180039467. The next prime is 12180039497. The reversal of 12180039481 is 18493008121.

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 10416039481 + 1764000000 = 102059^2 + 42000^2 .

It is a cyclic number.

It is not a de Polignac number, because 12180039481 - 2¹⁹ = 12179515193 is a prime.

It is a super-2 number, since 2×12180039481² (a number of 21 digits) contains 22 as substring.

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 12180039481.

It is not an unprimeable number, because it can be changed into a prime (12180039581) 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, 28476 + ... + 158653.

It is an arithmetic number, because the mean of its divisors is an integer number (3045072925).

Almost surely, 2^12180039481 is an apocalyptic number.

It is an amenable number.

12180039481 is a deficient number, since it is larger than the sum of its proper divisors (252219).

12180039481 is an equidigital number, since it uses as much as digits as its factorization.

12180039481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252218.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 12180039481 in words is "twelve billion, one hundred eighty million, thirty-nine thousand, four hundred eighty-one".