13122244321 has 4 divisors (see below), whose sum is σ = 13122475200. Its totient is φ = 13122013444.

The previous prime is 13122244319. The next prime is 13122244327. The reversal of 13122244321 is 12344222131.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12344222131 = 617 ⋅20006843.

It is a cyclic number.

It is not a de Polignac number, because 13122244321 - 2¹ = 13122244319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13122244327) 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, 36300 + ... + 166018.

It is an arithmetic number, because the mean of its divisors is an integer number (3280618800).

Almost surely, 2^13122244321 is an apocalyptic number.

It is an amenable number.

13122244321 is a deficient number, since it is larger than the sum of its proper divisors (230879).

13122244321 is a wasteful number, since it uses less digits than its factorization.

13122244321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230878.

The product of its digits is 2304, while the sum is 25.

Adding to 13122244321 its reverse (12344222131), we get a palindrome (25466466452).

The spelling of 13122244321 in words is "thirteen billion, one hundred twenty-two million, two hundred forty-four thousand, three hundred twenty-one".