13211314021 has 4 divisors (see below), whose sum is σ = 13287680172. Its totient is φ = 13134947872.

The previous prime is 13211314009. The next prime is 13211314031. The reversal of 13211314021 is 12041311231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12041311231 = 52553 ⋅229127.

It can be written as a sum of positive squares in 2 ways, for example, as 5216450625 + 7994863396 = 72225^2 + 89414^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211314021 - 2⁷ = 13211313893 is a prime.

It is a super-2 number, since 2×13211314021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13211314021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211314001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38182816 + ... + 38183161.

It is an arithmetic number, because the mean of its divisors is an integer number (3321920043).

Almost surely, 2^13211314021 is an apocalyptic number.

It is an amenable number.

13211314021 is a deficient number, since it is larger than the sum of its proper divisors (76366151).

13211314021 is an equidigital number, since it uses as much as digits as its factorization.

13211314021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76366150.

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

Adding to 13211314021 its reverse (12041311231), we get a palindrome (25252625252).

The spelling of 13211314021 in words is "thirteen billion, two hundred eleven million, three hundred fourteen thousand, twenty-one".