121303120 has 20 divisors (see below), whose sum is σ = 282029940. Its totient is φ = 48521216.

The previous prime is 121303033. The next prime is 121303141. The reversal of 121303120 is 21303121.

It can be written as a sum of positive squares in 2 ways, for example, as 82664464 + 38638656 = 9092^2 + 6216^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 121303120.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 758065 + ... + 758224.

It is an arithmetic number, because the mean of its divisors is an integer number (14101497).

Almost surely, 2^121303120 is an apocalyptic number.

121303120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121303120 is an abundant number, since it is smaller than the sum of its proper divisors (160726820).

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

121303120 is a wasteful number, since it uses less digits than its factorization.

121303120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516302 (or 1516296 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 121303120 is about 11013.7695635963. The cubic root of 121303120 is about 495.0214186562.

Adding to 121303120 its reverse (21303121), we get a palindrome (142606241).

Subtracting from 121303120 its reverse (21303121), we obtain a palindrome (99999999).

The spelling of 121303120 in words is "one hundred twenty-one million, three hundred three thousand, one hundred twenty".