113221100400 has 120 divisors (see below), whose sum is σ = 363159516720. Its totient is φ = 30152785920.

The previous prime is 113221100389. The next prime is 113221100407. The reversal of 113221100400 is 4001122311.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 113221100400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113221100407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 861454 + ... + 984146.

It is an arithmetic number, because the mean of its divisors is an integer number (3026329306).

Almost surely, 2^113221100400 is an apocalyptic number.

113221100400 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 113221100400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181579758360).

113221100400 is an abundant number, since it is smaller than the sum of its proper divisors (249938416320).

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

113221100400 is a wasteful number, since it uses less digits than its factorization.

113221100400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123483 (or 123472 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 113221100400 its reverse (4001122311), we get a palindrome (117222222711).

The spelling of 113221100400 in words is "one hundred thirteen billion, two hundred twenty-one million, one hundred thousand, four hundred".