131212101 has 16 divisors (see below), whose sum is σ = 180355904. Its totient is φ = 84789504.

The previous prime is 131212093. The next prime is 131212111. The reversal of 131212101 is 101212131.

It is not a de Polignac number, because 131212101 - 2³ = 131212093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131212111) 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 in 15 ways as a sum of consecutive naturals, for example, 29325 + ... + 33501.

It is an arithmetic number, because the mean of its divisors is an integer number (11272244).

Almost surely, 2^131212101 is an apocalyptic number.

It is an amenable number.

131212101 is a deficient number, since it is larger than the sum of its proper divisors (49143803).

131212101 is a wasteful number, since it uses less digits than its factorization.

131212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 131212101 is about 11454.7850700046. The cubic root of 131212101 is about 508.1492588979.

Adding to 131212101 its reverse (101212131), we get a palindrome (232424232).

The spelling of 131212101 in words is "one hundred thirty-one million, two hundred twelve thousand, one hundred one".