131230231020 has 216 divisors, whose sum is σ = 479023599600. Its totient is φ = 28961097984.

The previous prime is 131230231009. The next prime is 131230231051. The reversal of 131230231020 is 20132032131.

131230231020 is a `hidden beast` number, since 1 + 31 + 2 + 302 + 310 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131230230984 and 131230231002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 750 + ... + 512309.

It is an arithmetic number, because the mean of its divisors is an integer number (2217701850).

Almost surely, 2^131230231020 is an apocalyptic number.

131230231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131230231020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239511799800).

131230231020 is an abundant number, since it is smaller than the sum of its proper divisors (347793368580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131230231020 is a wasteful number, since it uses less digits than its factorization.

131230231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513117 (or 513105 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 131230231020 its reverse (20132032131), we get a palindrome (151362263151).

The spelling of 131230231020 in words is "one hundred thirty-one billion, two hundred thirty million, two hundred thirty-one thousand, twenty".