13221440313131 has 4 divisors (see below), whose sum is σ = 13221509981352. Its totient is φ = 13221370644912.

The previous prime is 13221440313113. The next prime is 13221440313223. The reversal of 13221440313131 is 13131304412231.

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

It is a cyclic number.

It is not a de Polignac number, because 13221440313131 - 2¹⁰ = 13221440312107 is a prime.

It is a super-2 number, since 2×13221440313131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221440313094 and 13221440313103.

It is not an unprimeable number, because it can be changed into a prime (13221440318131) 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, 34548665 + ... + 34929258.

It is an arithmetic number, because the mean of its divisors is an integer number (3305377495338).

Almost surely, 2^{13221440313131} is an apocalyptic number.

13221440313131 is a deficient number, since it is larger than the sum of its proper divisors (69668221).

13221440313131 is an equidigital number, since it uses as much as digits as its factorization.

13221440313131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69668220.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 13221440313131 its reverse (13131304412231), we get a palindrome (26352744725362).

The spelling of 13221440313131 in words is "thirteen trillion, two hundred twenty-one billion, four hundred forty million, three hundred thirteen thousand, one hundred thirty-one".