13221065403 has 64 divisors (see below), whose sum is σ = 24938188800. Its totient is φ = 6733238400.

The previous prime is 13221065383. The next prime is 13221065437. The reversal of 13221065403 is 30456012231.

13221065403 is a `hidden beast` number, since 1 + 3 + 2 + 2 + 1 + 0 + 654 + 0 + 3 = 666.

It is not a de Polignac number, because 13221065403 - 2⁸ = 13221065147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13221065443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21523 + ... + 164028.

It is an arithmetic number, because the mean of its divisors is an integer number (389659200).

Almost surely, 2^13221065403 is an apocalyptic number.

13221065403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13221065403 is a deficient number, since it is larger than the sum of its proper divisors (11717123397).

13221065403 is a wasteful number, since it uses less digits than its factorization.

13221065403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185609 (or 185603 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 13221065403 its reverse (30456012231), we get a palindrome (43677077634).

The spelling of 13221065403 in words is "thirteen billion, two hundred twenty-one million, sixty-five thousand, four hundred three".