131323113121221 has 24 divisors (see below), whose sum is σ = 216788837987904. Its totient is φ = 75041267780160.

The previous prime is 131323113121171. The next prime is 131323113121259. The reversal of 131323113121221 is 122121311323131.

131323113121221 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 2 + 311 + 3 + 121 + 221 = 666.

It is not a de Polignac number, because 131323113121221 - 2⁶ = 131323113121157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131323113121021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2321670 + ... + 16371816.

It is an arithmetic number, because the mean of its divisors is an integer number (9032868249496).

Almost surely, 2^{131323113121221} is an apocalyptic number.

It is an amenable number.

131323113121221 is a deficient number, since it is larger than the sum of its proper divisors (85465724866683).

131323113121221 is a wasteful number, since it uses less digits than its factorization.

131323113121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198521 (or 14198518 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

Adding to 131323113121221 its reverse (122121311323131), we get a palindrome (253444424444352).

The spelling of 131323113121221 in words is "one hundred thirty-one trillion, three hundred twenty-three billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred twenty-one".