13221100553455 has 4 divisors (see below), whose sum is σ = 15865320664152. Its totient is φ = 10576880442760.

The previous prime is 13221100553447. The next prime is 13221100553467. The reversal of 13221100553455 is 55435500112231.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13221100553455 - 2³ = 13221100553447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322110055341 + ... + 1322110055350.

It is an arithmetic number, because the mean of its divisors is an integer number (3966330166038).

Almost surely, 2^{13221100553455} is an apocalyptic number.

13221100553455 is a deficient number, since it is larger than the sum of its proper divisors (2644220110697).

13221100553455 is an equidigital number, since it uses as much as digits as its factorization.

13221100553455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644220110696.

The product of its (nonzero) digits is 90000, while the sum is 37.

Adding to 13221100553455 its reverse (55435500112231), we get a palindrome (68656600665686).

The spelling of 13221100553455 in words is "thirteen trillion, two hundred twenty-one billion, one hundred million, five hundred fifty-three thousand, four hundred fifty-five".