131312121331 has 2 divisors, whose sum is σ = 131312121332. Its totient is φ = 131312121330.

The previous prime is 131312121233. The next prime is 131312121337. The reversal of 131312121331 is 133121213131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131312121331 - 2¹⁵ = 131312088563 is a prime.

It is a super-2 number, since 2×131312121331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131312121337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65656060665 + 65656060666.

It is an arithmetic number, because the mean of its divisors is an integer number (65656060666).

Almost surely, 2^131312121331 is an apocalyptic number.

131312121331 is a deficient number, since it is larger than the sum of its proper divisors (1).

131312121331 is an equidigital number, since it uses as much as digits as its factorization.

131312121331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 22.

Adding to 131312121331 its reverse (133121213131), we get a palindrome (264433334462).

The spelling of 131312121331 in words is "one hundred thirty-one billion, three hundred twelve million, one hundred twenty-one thousand, three hundred thirty-one".