13440143221 has 16 divisors (see below), whose sum is σ = 14321318400. Its totient is φ = 12577302000.

The previous prime is 13440143207. The next prime is 13440143231. The reversal of 13440143221 is 12234104431.

It is a cyclic number.

It is not a de Polignac number, because 13440143221 - 2¹³ = 13440135029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440143231) 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, 500466 + ... + 526636.

It is an arithmetic number, because the mean of its divisors is an integer number (895082400).

Almost surely, 2^13440143221 is an apocalyptic number.

It is an amenable number.

13440143221 is a deficient number, since it is larger than the sum of its proper divisors (881175179).

13440143221 is a wasteful number, since it uses less digits than its factorization.

13440143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26520.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 13440143221 its reverse (12234104431), we get a palindrome (25674247652).

The spelling of 13440143221 in words is "thirteen billion, four hundred forty million, one hundred forty-three thousand, two hundred twenty-one".