13040430221 has 48 divisors (see below), whose sum is σ = 17185017600. Its totient is φ = 9868098240.

The previous prime is 13040430173. The next prime is 13040430241. The reversal of 13040430221 is 12203404031.

It is a de Polignac number, because none of the positive numbers 2^k-13040430221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13040430193 and 13040430202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13040430241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1328351 + ... + 1338131.

It is an arithmetic number, because the mean of its divisors is an integer number (358021200).

Almost surely, 2^13040430221 is an apocalyptic number.

It is an amenable number.

13040430221 is a deficient number, since it is larger than the sum of its proper divisors (4144587379).

13040430221 is an equidigital number, since it uses as much as digits as its factorization.

13040430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851 (or 9824 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 13040430221 its reverse (12203404031), we get a palindrome (25243834252).

The spelling of 13040430221 in words is "thirteen billion, forty million, four hundred thirty thousand, two hundred twenty-one".