13535411221 has 16 divisors (see below), whose sum is σ = 14095730880. Its totient is φ = 12986709120.

The previous prime is 13535411209. The next prime is 13535411249. The reversal of 13535411221 is 12211453531.

It is a cyclic number.

It is not a de Polignac number, because 13535411221 - 2⁵ = 13535411189 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 13535411221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13535411321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1806535 + ... + 1814011.

It is an arithmetic number, because the mean of its divisors is an integer number (880983180).

Almost surely, 2^13535411221 is an apocalyptic number.

It is an amenable number.

13535411221 is a deficient number, since it is larger than the sum of its proper divisors (560319659).

13535411221 is an equidigital number, since it uses as much as digits as its factorization.

13535411221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8244.

The product of its digits is 3600, while the sum is 28.

Adding to 13535411221 its reverse (12211453531), we get a palindrome (25746864752).

The spelling of 13535411221 in words is "thirteen billion, five hundred thirty-five million, four hundred eleven thousand, two hundred twenty-one".