13021320112 has 20 divisors (see below), whose sum is σ = 25234344720. Its totient is φ = 6509231168.

The previous prime is 13021320107. The next prime is 13021320113. The reversal of 13021320112 is 21102312031.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (13021320113) 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, 12103 + ... + 161830.

It is an arithmetic number, because the mean of its divisors is an integer number (1261717236).

Almost surely, 2^13021320112 is an apocalyptic number.

It is an amenable number.

13021320112 is a deficient number, since it is larger than the sum of its proper divisors (12213024608).

13021320112 is a wasteful number, since it uses less digits than its factorization.

13021320112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178620 (or 178614 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13021320112 its reverse (21102312031), we get a palindrome (34123632143).

The spelling of 13021320112 in words is "thirteen billion, twenty-one million, three hundred twenty thousand, one hundred twelve".