131313211331 has 4 divisors (see below), whose sum is σ = 138224433000. Its totient is φ = 124401989664.

The previous prime is 131313211327. The next prime is 131313211343. The reversal of 131313211331 is 133112313131.

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 131313211331 - 2² = 131313211327 is a prime.

It is a super-2 number, since 2×131313211331² (a number of 23 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 = 131313211297 and 131313211306.

It is not an unprimeable number, because it can be changed into a prime (131313217331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3455610806 + ... + 3455610843.

It is an arithmetic number, because the mean of its divisors is an integer number (34556108250).

Almost surely, 2^131313211331 is an apocalyptic number.

131313211331 is a deficient number, since it is larger than the sum of its proper divisors (6911221669).

131313211331 is an equidigital number, since it uses as much as digits as its factorization.

131313211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6911221668.

The product of its digits is 486, while the sum is 23.

Adding to 131313211331 its reverse (133112313131), we get a palindrome (264425524462).

The spelling of 131313211331 in words is "one hundred thirty-one billion, three hundred thirteen million, two hundred eleven thousand, three hundred thirty-one".