131210210212 has 18 divisors (see below), whose sum is σ = 233575684118. Its totient is φ = 64493147328.

The previous prime is 131210210171. The next prime is 131210210213. The reversal of 131210210212 is 212012012131.

It can be written as a sum of positive squares in only one way, i.e., 112859714916 + 18350495296 = 335946^2 + 135464^2 .

It is a super-2 number, since 2×131210210212² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131210210213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4697733 + ... + 4725580.

Almost surely, 2^131210210212 is an apocalyptic number.

It is an amenable number.

131210210212 is a deficient number, since it is larger than the sum of its proper divisors (102365473906).

131210210212 is an equidigital number, since it uses as much as digits as its factorization.

131210210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423435 (or 9423374 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 131210210212 its reverse (212012012131), we get a palindrome (343222222343).

The spelling of 131210210212 in words is "one hundred thirty-one billion, two hundred ten million, two hundred ten thousand, two hundred twelve".