13530202221 has 16 divisors (see below), whose sum is σ = 18427970304. Its totient is φ = 8826365184.

The previous prime is 13530202219. The next prime is 13530202241. The reversal of 13530202221 is 12220203531.

It is not a de Polignac number, because 13530202221 - 2¹ = 13530202219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13530202241) 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, 1086985 + ... + 1099361.

It is an arithmetic number, because the mean of its divisors is an integer number (1151748144).

Almost surely, 2^13530202221 is an apocalyptic number.

It is an amenable number.

13530202221 is a deficient number, since it is larger than the sum of its proper divisors (4897768083).

13530202221 is a wasteful number, since it uses less digits than its factorization.

13530202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20180.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 13530202221 its reverse (12220203531), we get a palindrome (25750405752).

The spelling of 13530202221 in words is "thirteen billion, five hundred thirty million, two hundred two thousand, two hundred twenty-one".