13121320213 has 4 divisors (see below), whose sum is σ = 13124292588. Its totient is φ = 13118347840.

The previous prime is 13121320189. The next prime is 13121320231. The reversal of 13121320213 is 31202312131.

13121320213 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: 31202312131 = 8191 ⋅3809341.

It can be written as a sum of positive squares in 2 ways, for example, as 7457704164 + 5663616049 = 86358^2 + 75257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13121320213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121320253) 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, 1479556 + ... + 1488397.

It is an arithmetic number, because the mean of its divisors is an integer number (3281073147).

Almost surely, 2^13121320213 is an apocalyptic number.

It is an amenable number.

13121320213 is a deficient number, since it is larger than the sum of its proper divisors (2972375).

13121320213 is an equidigital number, since it uses as much as digits as its factorization.

13121320213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972374.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13121320213 its reverse (31202312131), we get a palindrome (44323632344).

The spelling of 13121320213 in words is "thirteen billion, one hundred twenty-one million, three hundred twenty thousand, two hundred thirteen".