121221003303 has 16 divisors (see below), whose sum is σ = 181000744960. Its totient is φ = 80177669208.

The previous prime is 121221003271. The next prime is 121221003329. The reversal of 121221003303 is 303300122121.

121221003303 is a `hidden beast` number, since 121 + 2 + 210 + 0 + 330 + 3 = 666.

It is not a de Polignac number, because 121221003303 - 2⁵ = 121221003271 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 (121221003353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17672425 + ... + 17679282.

It is an arithmetic number, because the mean of its divisors is an integer number (11312546560).

Almost surely, 2^121221003303 is an apocalyptic number.

121221003303 is a deficient number, since it is larger than the sum of its proper divisors (59779741657).

121221003303 is a wasteful number, since it uses less digits than its factorization.

121221003303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35351843 (or 35351837 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 121221003303 its reverse (303300122121), we get a palindrome (424521125424).

The spelling of 121221003303 in words is "one hundred twenty-one billion, two hundred twenty-one million, three thousand, three hundred three".