131230200021 has 4 divisors (see below), whose sum is σ = 174973600032. Its totient is φ = 87486800012.

The previous prime is 131230200007. The next prime is 131230200037. The reversal of 131230200021 is 120002032131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120002032131 = 3 ⋅40000677377.

It is a cyclic number.

It is not a de Polignac number, because 131230200021 - 2¹⁰ = 131230198997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131230200041) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21871700001 + ... + 21871700006.

It is an arithmetic number, because the mean of its divisors is an integer number (43743400008).

Almost surely, 2^131230200021 is an apocalyptic number.

It is an amenable number.

131230200021 is a deficient number, since it is larger than the sum of its proper divisors (43743400011).

131230200021 is an equidigital number, since it uses as much as digits as its factorization.

131230200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43743400010.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 131230200021 its reverse (120002032131), we get a palindrome (251232232152).

The spelling of 131230200021 in words is "one hundred thirty-one billion, two hundred thirty million, two hundred thousand, twenty-one".