13201123221 has 96 divisors (see below), whose sum is σ = 23661281280. Its totient is φ = 6972739200.

The previous prime is 13201123219. The next prime is 13201123253. The reversal of 13201123221 is 12232110231.

13201123221 is a `hidden beast` number, since 1 + 320 + 1 + 123 + 221 = 666.

13201123221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13201123221 - 2¹ = 13201123219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13201123194 and 13201123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13201123211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8973516 + ... + 8974986.

It is an arithmetic number, because the mean of its divisors is an integer number (246471680).

Almost surely, 2^13201123221 is an apocalyptic number.

13201123221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13201123221 is a deficient number, since it is larger than the sum of its proper divisors (10460158059).

13201123221 is a wasteful number, since it uses less digits than its factorization.

13201123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1884 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 13201123221 its reverse (12232110231), we get a palindrome (25433233452).

The spelling of 13201123221 in words is "thirteen billion, two hundred one million, one hundred twenty-three thousand, two hundred twenty-one".