13321212131 has 4 divisors (see below), whose sum is σ = 13322379312. Its totient is φ = 13320044952.

The previous prime is 13321212119. The next prime is 13321212161. The reversal of 13321212131 is 13121212331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13321212131 is a prime.

It is a super-2 number, since 2×13321212131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13321212101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566300 + ... + 589353.

It is an arithmetic number, because the mean of its divisors is an integer number (3330594828).

Almost surely, 2^13321212131 is an apocalyptic number.

13321212131 is a deficient number, since it is larger than the sum of its proper divisors (1167181).

13321212131 is a wasteful number, since it uses less digits than its factorization.

13321212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167180.

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

Adding to 13321212131 its reverse (13121212331), we get a palindrome (26442424462).

The spelling of 13321212131 in words is "thirteen billion, three hundred twenty-one million, two hundred twelve thousand, one hundred thirty-one".