131211323 has 2 divisors, whose sum is σ = 131211324. Its totient is φ = 131211322.

The previous prime is 131211319. The next prime is 131211347. The reversal of 131211323 is 323112131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131211323 - 2² = 131211319 is a prime.

It is a super-2 number, since 2×131211323² = 34432822566820658, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (131231323) 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 as a sum of consecutive naturals, namely, 65605661 + 65605662.

It is an arithmetic number, because the mean of its divisors is an integer number (65605662).

Almost surely, 2^131211323 is an apocalyptic number.

131211323 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211323 is an equidigital number, since it uses as much as digits as its factorization.

131211323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 17.

The square root of 131211323 is about 11454.7511103472. The cubic root of 131211323 is about 508.1482545675.

Adding to 131211323 its reverse (323112131), we get a palindrome (454323454).

The spelling of 131211323 in words is "one hundred thirty-one million, two hundred eleven thousand, three hundred twenty-three".