13111320221 has 8 divisors (see below), whose sum is σ = 13307807520. Its totient is φ = 12916202608.

The previous prime is 13111320199. The next prime is 13111320251. The reversal of 13111320221 is 12202311131.

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 13111320221 - 2¹⁰ = 13111319197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13111320221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111320251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323126 + ... + 361431.

It is an arithmetic number, because the mean of its divisors is an integer number (1663475940).

Almost surely, 2^13111320221 is an apocalyptic number.

It is an amenable number.

13111320221 is a deficient number, since it is larger than the sum of its proper divisors (196487299).

13111320221 is a wasteful number, since it uses less digits than its factorization.

13111320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684843.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13111320221 its reverse (12202311131), we get a palindrome (25313631352).

The spelling of 13111320221 in words is "thirteen billion, one hundred eleven million, three hundred twenty thousand, two hundred twenty-one".