13221170536 has 32 divisors (see below), whose sum is σ = 28465375680. Its totient is φ = 5639356800.

The previous prime is 13221170461. The next prime is 13221170551. The reversal of 13221170536 is 63507112231.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13221170498 and 13221170507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547645 + ... + 571276.

It is an arithmetic number, because the mean of its divisors is an integer number (889542990).

Almost surely, 2^13221170536 is an apocalyptic number.

It is an amenable number.

13221170536 is an abundant number, since it is smaller than the sum of its proper divisors (15244205144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221170536 is a wasteful number, since it uses less digits than its factorization.

13221170536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119145 (or 1119141 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 13221170536 its reverse (63507112231), we get a palindrome (76728282767).

The spelling of 13221170536 in words is "thirteen billion, two hundred twenty-one million, one hundred seventy thousand, five hundred thirty-six".