13220112400 has 120 divisors (see below), whose sum is σ = 34763721408. Its totient is φ = 4791360000.

The previous prime is 13220112397. The next prime is 13220112413. The reversal of 13220112400 is 421102231.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1363570 + ... + 1373230.

Almost surely, 2^13220112400 is an apocalyptic number.

13220112400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13220112400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17381860704).

13220112400 is an abundant number, since it is smaller than the sum of its proper divisors (21543609008).

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

13220112400 is a wasteful number, since it uses less digits than its factorization.

13220112400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001 (or 9990 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 13220112400 its reverse (421102231), we get a palindrome (13641214631).

The spelling of 13220112400 in words is "thirteen billion, two hundred twenty million, one hundred twelve thousand, four hundred".