13201021221 has 8 divisors (see below), whose sum is σ = 17602422240. Its totient is φ = 8800150512.

The previous prime is 13201021219. The next prime is 13201021243. The reversal of 13201021221 is 12212010231.

13201021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13201021221 - 2¹ = 13201021219 is a prime.

It is a super-2 number, since 2×13201021221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13201021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13201021321) 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 7 ways as a sum of consecutive naturals, for example, 70315 + ... + 177048.

It is an arithmetic number, because the mean of its divisors is an integer number (2200302780).

Almost surely, 2^13201021221 is an apocalyptic number.

It is an amenable number.

13201021221 is a deficient number, since it is larger than the sum of its proper divisors (4401401019).

13201021221 is a wasteful number, since it uses less digits than its factorization.

13201021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265155.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 13201021221 its reverse (12212010231), we get a palindrome (25413031452).

The spelling of 13201021221 in words is "thirteen billion, two hundred one million, twenty-one thousand, two hundred twenty-one".