13221342881 has 4 divisors (see below), whose sum is σ = 13227608064. Its totient is φ = 13215077700.

The previous prime is 13221342851. The next prime is 13221342899. The reversal of 13221342881 is 18824312231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13221342881 - 2¹⁰ = 13221341857 is a prime.

It is a super-2 number, since 2×13221342881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221342851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3129425 + ... + 3133646.

It is an arithmetic number, because the mean of its divisors is an integer number (3306902016).

Almost surely, 2^13221342881 is an apocalyptic number.

It is an amenable number.

13221342881 is a deficient number, since it is larger than the sum of its proper divisors (6265183).

13221342881 is an equidigital number, since it uses as much as digits as its factorization.

13221342881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6265182.

The product of its digits is 18432, while the sum is 35.

The spelling of 13221342881 in words is "thirteen billion, two hundred twenty-one million, three hundred forty-two thousand, eight hundred eighty-one".