1121121112200 has 384 divisors, whose sum is σ = 3637914301440. Its totient is φ = 285344640000.

The previous prime is 1121121112183. The next prime is 1121121112231. The reversal of 1121121112200 is 22111211211.

It is a happy number.

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 1121121112200.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 332576515 + ... + 332579885.

It is an arithmetic number, because the mean of its divisors is an integer number (9473735160).

Almost surely, 2^{1121121112200} is an apocalyptic number.

1121121112200 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 1121121112200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1818957150720).

1121121112200 is an abundant number, since it is smaller than the sum of its proper divisors (2516793189240).

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

1121121112200 is a wasteful number, since it uses less digits than its factorization.

1121121112200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709 (or 3700 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121121112200 its reverse (22111211211), we get a palindrome (1143232323411).

It can be divided in two parts, 1121121 and 112200, that added together give a palindrome (1233321).

The spelling of 1121121112200 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, two hundred".