121520303 has 4 divisors (see below), whose sum is σ = 121572528. Its totient is φ = 121468080.

The previous prime is 121520299. The next prime is 121520309. The reversal of 121520303 is 303025121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121520303 - 2² = 121520299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121520309) 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, 22451 + ... + 27332.

It is an arithmetic number, because the mean of its divisors is an integer number (30393132).

Almost surely, 2^121520303 is an apocalyptic number.

121520303 is a deficient number, since it is larger than the sum of its proper divisors (52225).

121520303 is an equidigital number, since it uses as much as digits as its factorization.

121520303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52224.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 121520303 is about 11023.6247668360. The cubic root of 121520303 is about 495.3166738754.

Adding to 121520303 its reverse (303025121), we get a palindrome (424545424).

The spelling of 121520303 in words is "one hundred twenty-one million, five hundred twenty thousand, three hundred three".