131212031 has 2 divisors, whose sum is σ = 131212032. Its totient is φ = 131212030.

The previous prime is 131212021. The next prime is 131212093. The reversal of 131212031 is 130212131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131212031 - 2¹⁰ = 131211007 is a prime.

It is a super-2 number, since 2×131212031² = 34433194158289922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131211997 and 131212015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131212021) 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 as a sum of consecutive naturals, namely, 65606015 + 65606016.

It is an arithmetic number, because the mean of its divisors is an integer number (65606016).

Almost surely, 2^131212031 is an apocalyptic number.

131212031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131212031 is an equidigital number, since it uses as much as digits as its factorization.

131212031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 131212031 is about 11454.7820145125. The cubic root of 131212031 is about 508.1491685341.

Adding to 131212031 its reverse (130212131), we get a palindrome (261424162).

The spelling of 131212031 in words is "one hundred thirty-one million, two hundred twelve thousand, thirty-one".