131221122430311 has 16 divisors (see below), whose sum is σ = 198537868454400. Its totient is φ = 85619455769304.

The previous prime is 131221122430201. The next prime is 131221122430319. The reversal of 131221122430311 is 113034221122131.

131221122430311 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 211 + 2 + 2 + 430 + 3 + 11 = 666.

It is not a de Polignac number, because 131221122430311 - 2¹³ = 131221122422119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221122430319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51702568641 + ... + 51702571178.

It is an arithmetic number, because the mean of its divisors is an integer number (12408616778400).

Almost surely, 2^{131221122430311} is an apocalyptic number.

131221122430311 is a deficient number, since it is larger than the sum of its proper divisors (67316746024089).

131221122430311 is a wasteful number, since it uses less digits than its factorization.

131221122430311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103405139875 (or 103405139869 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 131221122430311 its reverse (113034221122131), we get a palindrome (244255343552442).

The spelling of 131221122430311 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, one hundred twenty-two million, four hundred thirty thousand, three hundred eleven".