13211221013 has 4 divisors (see below), whose sum is σ = 13460489388. Its totient is φ = 12961952640.

The previous prime is 13211220977. The next prime is 13211221019. The reversal of 13211221013 is 31012211231.

13211221013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31012211231 = 311 ⋅99717721.

It can be written as a sum of positive squares in 2 ways, for example, as 6707282404 + 6503938609 = 81898^2 + 80647^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211221013 - 2⁶ = 13211220949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13211220982 and 13211221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211221019) by changing a digit.

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, 124634108 + ... + 124634213.

It is an arithmetic number, because the mean of its divisors is an integer number (3365122347).

Almost surely, 2^13211221013 is an apocalyptic number.

It is an amenable number.

13211221013 is a deficient number, since it is larger than the sum of its proper divisors (249268375).

13211221013 is an equidigital number, since it uses as much as digits as its factorization.

13211221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249268374.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 13211221013 its reverse (31012211231), we get a palindrome (44223432244).

The spelling of 13211221013 in words is "thirteen billion, two hundred eleven million, two hundred twenty-one thousand, thirteen".