181316125281212 has 6 divisors (see below), whose sum is σ = 317303219242128. Its totient is φ = 90658062640604.

The previous prime is 181316125281167. The next prime is 181316125281311. The reversal of 181316125281212 is 212182521613181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22664515660148 + ... + 22664515660155.

It is an arithmetic number, because the mean of its divisors is an integer number (52883869873688).

Almost surely, 2^{181316125281212} is an apocalyptic number.

It is an amenable number.

181316125281212 is a deficient number, since it is larger than the sum of its proper divisors (135987093960916).

181316125281212 is a wasteful number, since it uses less digits than its factorization.

181316125281212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45329031320307 (or 45329031320305 counting only the distinct ones).

The product of its digits is 92160, while the sum is 44.

Adding to 181316125281212 its reverse (212182521613181), we get a palindrome (393498646894393).

The spelling of 181316125281212 in words is "one hundred eighty-one trillion, three hundred sixteen billion, one hundred twenty-five million, two hundred eighty-one thousand, two hundred twelve".