13211213231 has 8 divisors (see below), whose sum is σ = 13520141184. Its totient is φ = 12902362200.

The previous prime is 13211213207. The next prime is 13211213297. The reversal of 13211213231 is 13231211231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13211213231 - 2⁶ = 13211213167 is a prime.

It is a super-2 number, since 2×13211213231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211213201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474560 + ... + 501626.

It is an arithmetic number, because the mean of its divisors is an integer number (1690017648).

Almost surely, 2^13211213231 is an apocalyptic number.

13211213231 is a deficient number, since it is larger than the sum of its proper divisors (308927953).

13211213231 is a wasteful number, since it uses less digits than its factorization.

13211213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38461.

The product of its digits is 216, while the sum is 20.

Adding to 13211213231 its reverse (13231211231), we get a palindrome (26442424462).

The spelling of 13211213231 in words is "thirteen billion, two hundred eleven million, two hundred thirteen thousand, two hundred thirty-one".