1121121220000 has 480 divisors, whose sum is σ = 2996628022080. Its totient is φ = 411356160000.

The previous prime is 1121121219917. The next prime is 1121121220031. The reversal of 1121121220000 is 221211211.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3536659842 + ... + 3536660158.

It is an arithmetic number, because the mean of its divisors is an integer number (6242975046).

Almost surely, 2^{1121121220000} is an apocalyptic number.

1121121220000 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 1121121220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1498314011040).

1121121220000 is an abundant number, since it is smaller than the sum of its proper divisors (1875506802080).

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

1121121220000 is a wasteful number, since it uses less digits than its factorization.

1121121220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1121121220000 its reverse (221211211), we get a palindrome (1121342431211).

The spelling of 1121121220000 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand".