1121304400000 has 192 divisors, whose sum is σ = 2795481702720. Its totient is φ = 447984000000.

The previous prime is 1121304399997. The next prime is 1121304400261. The reversal of 1121304400000 is 44031211.

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, 612399085 + ... + 612400915.

It is an arithmetic number, because the mean of its divisors is an integer number (14559800535).

Almost surely, 2^{1121304400000} is an apocalyptic number.

1121304400000 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 1121304400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397740851360).

1121304400000 is an abundant number, since it is smaller than the sum of its proper divisors (1674177302720).

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

1121304400000 is an frugal number, since it uses more digits than its factorization.

1121304400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401 (or 3369 counting only the distinct ones).

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

Adding to 1121304400000 its reverse (44031211), we get a palindrome (1121348431211).

The spelling of 1121304400000 in words is "one trillion, one hundred twenty-one billion, three hundred four million, four hundred thousand".