13121221303 has 8 divisors (see below), whose sum is σ = 13576020480. Its totient is φ = 12666578400.

The previous prime is 13121221297. The next prime is 13121221319. The reversal of 13121221303 is 30312212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13121221303 - 2⁵ = 13121221271 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 (13121221403) 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 7 ways as a sum of consecutive naturals, for example, 146826 + ... + 218632.

It is an arithmetic number, because the mean of its divisors is an integer number (1697002560).

Almost surely, 2^13121221303 is an apocalyptic number.

13121221303 is a deficient number, since it is larger than the sum of its proper divisors (454799177).

13121221303 is an equidigital number, since it uses as much as digits as its factorization.

13121221303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78137.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13121221303 its reverse (30312212131), we get a palindrome (43433433434).

The spelling of 13121221303 in words is "thirteen billion, one hundred twenty-one million, two hundred twenty-one thousand, three hundred three".