13205353221 has 12 divisors (see below), whose sum is σ = 19075960800. Its totient is φ = 8802848040.

The previous prime is 13205353127. The next prime is 13205353223. The reversal of 13205353221 is 12235350231.

It is a happy number.

It is not a de Polignac number, because 13205353221 - 2⁹ = 13205352709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13205353223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71026 + ... + 177356.

It is an arithmetic number, because the mean of its divisors is an integer number (1589663400).

Almost surely, 2^13205353221 is an apocalyptic number.

It is an amenable number.

13205353221 is a deficient number, since it is larger than the sum of its proper divisors (5870607579).

13205353221 is a wasteful number, since it uses less digits than its factorization.

13205353221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120136 (or 120133 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The spelling of 13205353221 in words is "thirteen billion, two hundred five million, three hundred fifty-three thousand, two hundred twenty-one".