1121000120000 has 140 divisors (see below), whose sum is σ = 2780807525496. Its totient is φ = 448224000000.

The previous prime is 1121000119999. The next prime is 1121000120003. The reversal of 1121000120000 is 210001211.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1121000120000.

It is not an unprimeable number, because it can be changed into a prime (1121000120003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 160116500 + ... + 160123500.

Almost surely, 2^{1121000120000} is an apocalyptic number.

1121000120000 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 1121000120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390403762748).

1121000120000 is an abundant number, since it is smaller than the sum of its proper divisors (1659807405496).

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

1121000120000 is an frugal number, since it uses more digits than its factorization.

1121000120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11036 (or 11011 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1121000120000 its reverse (210001211), we get a palindrome (1121210121211).

The spelling of 1121000120000 in words is "one trillion, one hundred twenty-one billion, one hundred twenty thousand".