13121310231 has 8 divisors (see below), whose sum is σ = 19438978160. Its totient is φ = 8747540136.

The previous prime is 13121310221. The next prime is 13121310233. The reversal of 13121310231 is 13201312131.

13121310231 is a `hidden beast` number, since 1 + 3 + 121 + 310 + 231 = 666.

13121310231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13121310231 - 2⁵ = 13121310199 is a prime.

It is a super-2 number, since 2×13121310231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121310233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242987200 + ... + 242987253.

It is an arithmetic number, because the mean of its divisors is an integer number (2429872270).

Almost surely, 2^13121310231 is an apocalyptic number.

13121310231 is a deficient number, since it is larger than the sum of its proper divisors (6317667929).

13121310231 is an equidigital number, since it uses as much as digits as its factorization.

13121310231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485974462 (or 485974456 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 13121310231 its reverse (13201312131), we get a palindrome (26322622362).

The spelling of 13121310231 in words is "thirteen billion, one hundred twenty-one million, three hundred ten thousand, two hundred thirty-one".