13205011 has 4 divisors (see below), whose sum is σ = 13213152. Its totient is φ = 13196872.

The previous prime is 13204973. The next prime is 13205029. The reversal of 13205011 is 11050231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11050231 = 181 ⋅61051.

It is a cyclic number.

It is not a de Polignac number, because 13205011 - 2⁷ = 13204883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13204982 and 13205000.

It is not an unprimeable number, because it can be changed into a prime (13205081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715 + ... + 5188.

It is an arithmetic number, because the mean of its divisors is an integer number (3303288).

Almost surely, 2^13205011 is an apocalyptic number.

13205011 is a deficient number, since it is larger than the sum of its proper divisors (8141).

13205011 is an equidigital number, since it uses as much as digits as its factorization.

13205011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 13205011 is about 3633.8699756596. The cubic root of 13205011 is about 236.3630520023.

Adding to 13205011 its reverse (11050231), we get a palindrome (24255242).

The spelling of 13205011 in words is "thirteen million, two hundred five thousand, eleven".