131344431241221 has 12 divisors (see below), whose sum is σ = 206966982562080. Its totient is φ = 79602685600680.

The previous prime is 131344431241193. The next prime is 131344431241291. The reversal of 131344431241221 is 122142134443131.

131344431241221 is a `hidden beast` number, since 1 + 3 + 1 + 344 + 43 + 12 + 41 + 221 = 666.

It is not a de Polignac number, because 131344431241221 - 2⁶ = 131344431241157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131344431241291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663355713241 + ... + 663355713438.

It is an arithmetic number, because the mean of its divisors is an integer number (17247248546840).

Almost surely, 2^{131344431241221} is an apocalyptic number.

131344431241221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131344431241221 is a deficient number, since it is larger than the sum of its proper divisors (75622551320859).

131344431241221 is a wasteful number, since it uses less digits than its factorization.

131344431241221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326711426696 (or 1326711426693 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

Adding to 131344431241221 its reverse (122142134443131), we get a palindrome (253486565684352).

The spelling of 131344431241221 in words is "one hundred thirty-one trillion, three hundred forty-four billion, four hundred thirty-one million, two hundred forty-one thousand, two hundred twenty-one".