131231221202212 has 12 divisors (see below), whose sum is σ = 229654717356400. Its totient is φ = 65615587671816.

The previous prime is 131231221202189. The next prime is 131231221202219. The reversal of 131231221202212 is 212202122132131.

It is not an unprimeable number, because it can be changed into a prime (131231221202219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19039723 + ... + 24999469.

Almost surely, 2^{131231221202212} is an apocalyptic number.

It is an amenable number.

131231221202212 is a deficient number, since it is larger than the sum of its proper divisors (98423496154188).

131231221202212 is a wasteful number, since it uses less digits than its factorization.

131231221202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11464650 (or 11464648 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 131231221202212 its reverse (212202122132131), we get a palindrome (343433343334343).

The spelling of 131231221202212 in words is "one hundred thirty-one trillion, two hundred thirty-one billion, two hundred twenty-one million, two hundred two thousand, two hundred twelve".