121121120 has 48 divisors (see below), whose sum is σ = 286938288.
Its totient is φ = 48314880.
The previous prime is 121121113. The next prime is 121121129. The reversal of 121121120 is 21121121.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (121121129) by changing a digit.
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 7 ways as a sum of consecutive naturals, for example, 73910 + ... + 75530.
It is an arithmetic number, because the mean of its divisors is an integer number (5977881).
Almost surely, 2121121120 is an apocalyptic number.
121121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
121121120 is an abundant number, since it is smaller than the sum of its proper divisors (165817168).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
121121120 is a wasteful number, since it uses less digits than its factorization.
121121120 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2103 (or 2095 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 11.
The square root of 121121120 is about 11005.5040775059.
The cubic root of 121121120 is about 494.7737223784.
Adding to 121121120 its reverse (21121121), we get a palindrome (142242241).
Subtracting from 121121120 its reverse (21121121), we obtain a palindrome (99999999).
The spelling of 121121120 in words is "one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty".