121503103303 has 4 divisors (see below), whose sum is σ = 121543061328. Its totient is φ = 121463145280.

The previous prime is 121503103301. The next prime is 121503103327. The reversal of 121503103303 is 303301305121.

It is a happy number.

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 121503103303 - 2¹ = 121503103301 is a prime.

It is a super-2 number, since 2×121503103303² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121503103301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19974451 + ... + 19980532.

It is an arithmetic number, because the mean of its divisors is an integer number (30385765332).

Almost surely, 2^121503103303 is an apocalyptic number.

121503103303 is a deficient number, since it is larger than the sum of its proper divisors (39958025).

121503103303 is an equidigital number, since it uses as much as digits as its factorization.

121503103303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39958024.

The product of its (nonzero) digits is 810, while the sum is 22.

Adding to 121503103303 its reverse (303301305121), we get a palindrome (424804408424).

The spelling of 121503103303 in words is "one hundred twenty-one billion, five hundred three million, one hundred three thousand, three hundred three".