13128311216 has 20 divisors (see below), whose sum is σ = 25583137872. Its totient is φ = 6526211136.

The previous prime is 13128311201. The next prime is 13128311219. The reversal of 13128311216 is 61211382131.

It is not an unprimeable number, because it can be changed into a prime (13128311219) 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, 2368676 + ... + 2374211.

Almost surely, 2^13128311216 is an apocalyptic number.

13128311216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13128311216 is a deficient number, since it is larger than the sum of its proper divisors (12454826656).

13128311216 is a wasteful number, since it uses less digits than its factorization.

13128311216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743068 (or 4743062 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

Adding to 13128311216 its reverse (61211382131), we get a palindrome (74339693347).

The spelling of 13128311216 in words is "thirteen billion, one hundred twenty-eight million, three hundred eleven thousand, two hundred sixteen".