13211413121 has 4 divisors (see below), whose sum is σ = 13230047700. Its totient is φ = 13192778544.

The previous prime is 13211413109. The next prime is 13211413147. The reversal of 13211413121 is 12131411231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12131411231 = 14419 ⋅841349.

It can be written as a sum of positive squares in 2 ways, for example, as 6970413121 + 6241000000 = 83489^2 + 79000^2 .

It is a cyclic number.

It is not a de Polignac number, because 13211413121 - 2⁶ = 13211413057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13211413093 and 13211413102.

It is not an unprimeable number, because it can be changed into a prime (13211413151) 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, 9316226 + ... + 9317643.

It is an arithmetic number, because the mean of its divisors is an integer number (3307511925).

Almost surely, 2^13211413121 is an apocalyptic number.

It is an amenable number.

13211413121 is a deficient number, since it is larger than the sum of its proper divisors (18634579).

13211413121 is an equidigital number, since it uses as much as digits as its factorization.

13211413121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18634578.

The product of its digits is 144, while the sum is 20.

Adding to 13211413121 its reverse (12131411231), we get a palindrome (25342824352).

The spelling of 13211413121 in words is "thirteen billion, two hundred eleven million, four hundred thirteen thousand, one hundred twenty-one".