121302320 has 20 divisors (see below), whose sum is σ = 282028080. Its totient is φ = 48520896.

The previous prime is 121302277. The next prime is 121302323. The reversal of 121302320 is 23203121.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 121302295 and 121302304.

It is not an unprimeable number, because it can be changed into a prime (121302323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758060 + ... + 758219.

It is an arithmetic number, because the mean of its divisors is an integer number (14101404).

Almost surely, 2^121302320 is an apocalyptic number.

121302320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121302320 is an abundant number, since it is smaller than the sum of its proper divisors (160725760).

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

121302320 is a wasteful number, since it uses less digits than its factorization.

121302320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516292 (or 1516286 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 121302320 is about 11013.7332453624. The cubic root of 121302320 is about 495.0203304237.

Adding to 121302320 its reverse (23203121), we get a palindrome (144505441).

The spelling of 121302320 in words is "one hundred twenty-one million, three hundred two thousand, three hundred twenty".