13001244221 has 4 divisors (see below), whose sum is σ = 14858564832. Its totient is φ = 11143923612.

The previous prime is 13001244203. The next prime is 13001244227. The reversal of 13001244221 is 12244210031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13001244221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13001244193 and 13001244202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13001244227) 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, 928660295 + ... + 928660308.

It is an arithmetic number, because the mean of its divisors is an integer number (3714641208).

Almost surely, 2^13001244221 is an apocalyptic number.

It is an amenable number.

13001244221 is a deficient number, since it is larger than the sum of its proper divisors (1857320611).

13001244221 is an equidigital number, since it uses as much as digits as its factorization.

13001244221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857320610.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 13001244221 its reverse (12244210031), we get a palindrome (25245454252).

The spelling of 13001244221 in words is "thirteen billion, one million, two hundred forty-four thousand, two hundred twenty-one".