121120 has 24 divisors (see below), whose sum is σ = 286524. Its totient is φ = 48384.

The previous prime is 121081. The next prime is 121123. The reversal of 121120 is 21121.

It can be written as a sum of positive squares in 2 ways, for example, as 121104 + 16 = 348^2 + 4^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (121123) by changing a digit.

121120 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219 + ... + 538.

2¹²¹¹²⁰ is an apocalyptic number.

121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121120 is an abundant number, since it is smaller than the sum of its proper divisors (165404).

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

121120 is an equidigital number, since it uses as much as digits as its factorization.

121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 121120 is about 348.0229877465. The cubic root of 121120 is about 49.4772197326.

Adding to 121120 its reverse (21121), we get a palindrome (142241).

Subtracting from 121120 its reverse (21121), we obtain a palindrome (99999).

The spelling of 121120 in words is "one hundred twenty-one thousand, one hundred twenty", and thus it is an iban number.