12112004400 has 120 divisors (see below), whose sum is σ = 38826306624. Its totient is φ = 3227577600.

The previous prime is 12112004371. The next prime is 12112004431. The reversal of 12112004400 is 440021121.

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 12112004400.

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, 2314587 + ... + 2319813.

Almost surely, 2^12112004400 is an apocalyptic number.

12112004400 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 12112004400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19413153312).

12112004400 is an abundant number, since it is smaller than the sum of its proper divisors (26714302224).

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

12112004400 is a wasteful number, since it uses less digits than its factorization.

12112004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179 (or 7168 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12112004400 its reverse (440021121), we get a palindrome (12552025521).

The spelling of 12112004400 in words is "twelve billion, one hundred twelve million, four thousand, four hundred".