131231320222131 has 24 divisors (see below), whose sum is σ = 192255000247440. Its totient is φ = 86247850461696.

The previous prime is 131231320222073. The next prime is 131231320222147. The reversal of 131231320222131 is 131222023132131.

131231320222131 is a `hidden beast` number, since 1 + 3 + 1 + 231 + 3 + 202 + 221 + 3 + 1 = 666.

It is not a de Polignac number, because 131231320222131 - 2¹⁷ = 131231320091059 is a prime.

It is a super-2 number, since 2×131231320222131² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131231320222095 and 131231320222104.

It is not an unprimeable number, because it can be changed into a prime (131231320220131) 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, 242807745 + ... + 243347618.

It is an arithmetic number, because the mean of its divisors is an integer number (8010625010310).

Almost surely, 2^{131231320222131} is an apocalyptic number.

131231320222131 is a deficient number, since it is larger than the sum of its proper divisors (61023680025309).

131231320222131 is a wasteful number, since it uses less digits than its factorization.

131231320222131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486155795 (or 486155792 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 131231320222131 its reverse (131222023132131), we get a palindrome (262453343354262).

The spelling of 131231320222131 in words is "one hundred thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, two hundred twenty-two thousand, one hundred thirty-one".