13221121003 has 4 divisors (see below), whose sum is σ = 13221624400. Its totient is φ = 13220617608.

The previous prime is 13221120959. The next prime is 13221121007. The reversal of 13221121003 is 30012112231.

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 13221121003 - 2¹³ = 13221112811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221121007) 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, 210000 + ... + 265597.

It is an arithmetic number, because the mean of its divisors is an integer number (3305406100).

Almost surely, 2^13221121003 is an apocalyptic number.

13221121003 is a deficient number, since it is larger than the sum of its proper divisors (503397).

13221121003 is an equidigital number, since it uses as much as digits as its factorization.

13221121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503396.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13221121003 its reverse (30012112231), we get a palindrome (43233233234).

The spelling of 13221121003 in words is "thirteen billion, two hundred twenty-one million, one hundred twenty-one thousand, three".