13220131112 has 8 divisors (see below), whose sum is σ = 24787745850. Its totient is φ = 6610065552.

The previous prime is 13220131109. The next prime is 13220131147. The reversal of 13220131112 is 21113102231.

13220131112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7083915556 + 6136215556 = 84166^2 + 78334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 826258187 + ... + 826258202.

Almost surely, 2^13220131112 is an apocalyptic number.

It is an amenable number.

13220131112 is a deficient number, since it is larger than the sum of its proper divisors (11567614738).

13220131112 is a wasteful number, since it uses less digits than its factorization.

13220131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652516395 (or 1652516391 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13220131112 its reverse (21113102231), we get a palindrome (34333233343).

The spelling of 13220131112 in words is "thirteen billion, two hundred twenty million, one hundred thirty-one thousand, one hundred twelve".