13212121213 has 4 divisors (see below), whose sum is σ = 13409317120. Its totient is φ = 13014925308.

The previous prime is 13212121199. The next prime is 13212121243. The reversal of 13212121213 is 31212121231.

13212121213 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31212121231 = 4673 ⋅6679247.

It is a cyclic number.

It is not a de Polignac number, because 13212121213 - 2²⁵ = 13178566781 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 (13212121243) 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, 98597853 + ... + 98597986.

It is an arithmetic number, because the mean of its divisors is an integer number (3352329280).

Almost surely, 2^13212121213 is an apocalyptic number.

It is an amenable number.

13212121213 is a deficient number, since it is larger than the sum of its proper divisors (197195907).

13212121213 is an equidigital number, since it uses as much as digits as its factorization.

13212121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197195906.

The product of its digits is 144, while the sum is 19.

Adding to 13212121213 its reverse (31212121231), we get a palindrome (44424242444).

The spelling of 13212121213 in words is "thirteen billion, two hundred twelve million, one hundred twenty-one thousand, two hundred thirteen".