13220111566112 has 96 divisors (see below), whose sum is σ = 30065810874624. Its totient is φ = 5655205785600.

The previous prime is 13220111566111. The next prime is 13220111566133. The reversal of 13220111566112 is 21166511102231.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (13220111566111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79989353 + ... + 80154455.

It is an arithmetic number, because the mean of its divisors is an integer number (313185529944).

Almost surely, 2^{13220111566112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13220111566112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15032905437312).

13220111566112 is an abundant number, since it is smaller than the sum of its proper divisors (16845699308512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13220111566112 is a wasteful number, since it uses less digits than its factorization.

13220111566112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178522 (or 178514 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

Adding to 13220111566112 its reverse (21166511102231), we get a palindrome (34386622668343).

The spelling of 13220111566112 in words is "thirteen trillion, two hundred twenty billion, one hundred eleven million, five hundred sixty-six thousand, one hundred twelve".