131021004221320 has 32 divisors (see below), whose sum is σ = 294797596872600. Its totient is φ = 52408341710848.

The previous prime is 131021004221311. The next prime is 131021004221399. The reversal of 131021004221320 is 23122400120131.

It can be written as a sum of positive squares in 4 ways, for example, as 121966092718276 + 9054911503044 = 11043826^2 + 3009138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131021004221291 and 131021004221300.

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 7 ways as a sum of consecutive naturals, for example, 54298266 + ... + 56659894.

Almost surely, 2^{131021004221320} is an apocalyptic number.

131021004221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131021004221320 is an abundant number, since it is smaller than the sum of its proper divisors (163776592651280).

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

131021004221320 is a wasteful number, since it uses less digits than its factorization.

131021004221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748617 (or 3748613 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 131021004221320 its reverse (23122400120131), we get a palindrome (154143404341451).

The spelling of 131021004221320 in words is "one hundred thirty-one trillion, twenty-one billion, four million, two hundred twenty-one thousand, three hundred twenty".