13311131209 has 4 divisors (see below), whose sum is σ = 13311409300. Its totient is φ = 13310853120.

The previous prime is 13311131161. The next prime is 13311131219. The reversal of 13311131209 is 90213111331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90213111331 = 7 ⋅12887587333.

It can be written as a sum of positive squares in 2 ways, for example, as 2825985600 + 10485145609 = 53160^2 + 102397^2 .

It is a cyclic number.

It is not a de Polignac number, because 13311131209 - 2²⁵ = 13277576777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13311131219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46884 + ... + 169765.

It is an arithmetic number, because the mean of its divisors is an integer number (3327852325).

Almost surely, 2^13311131209 is an apocalyptic number.

It is an amenable number.

13311131209 is a deficient number, since it is larger than the sum of its proper divisors (278091).

13311131209 is an equidigital number, since it uses as much as digits as its factorization.

13311131209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278090.

The product of its (nonzero) digits is 486, while the sum is 25.

The spelling of 13311131209 in words is "thirteen billion, three hundred eleven million, one hundred thirty-one thousand, two hundred nine".