1121121220120 has 128 divisors (see below), whose sum is σ = 2817702650880. Its totient is φ = 398035008000.

The previous prime is 1121121220117. The next prime is 1121121220147. The reversal of 1121121220120 is 210221211211.

It is a junction number, because it is equal to n+sod(n) for n = 1121121220094 and 1121121220103.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 3043510 + ... + 3391930.

It is an arithmetic number, because the mean of its divisors is an integer number (22013301960).

Almost surely, 2^{1121121220120} is an apocalyptic number.

1121121220120 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 1121121220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408851325440).

1121121220120 is an abundant number, since it is smaller than the sum of its proper divisors (1696581430760).

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

1121121220120 is a wasteful number, since it uses less digits than its factorization.

1121121220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348617 (or 348613 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121121220120 its reverse (210221211211), we get a palindrome (1331342431331).

The spelling of 1121121220120 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty".