1113231121200 has 1620 divisors, whose sum is σ = 4652127348960. Its totient is φ = 246100377600.

The previous prime is 1113231121187. The next prime is 1113231121229. The reversal of 1113231121200 is 21211323111.

1113231121200 is a `hidden beast` number, since 1 + 1 + 132 + 311 + 21 + 200 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 323 ways as a sum of consecutive naturals, for example, 4657870681 + ... + 4657870919.

Almost surely, 2^{1113231121200} is an apocalyptic number.

1113231121200 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 1113231121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2326063674480).

1113231121200 is an abundant number, since it is smaller than the sum of its proper divisors (3538896227760).

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

1113231121200 is a wasteful number, since it uses less digits than its factorization.

1113231121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1113231121200 its reverse (21211323111), we get a palindrome (1134442444311).

The spelling of 1113231121200 in words is "one trillion, one hundred thirteen billion, two hundred thirty-one million, one hundred twenty-one thousand, two hundred".