131201420200421 has 4 divisors (see below), whose sum is σ = 131203831646700. Its totient is φ = 131199008754144.

The previous prime is 131201420200397. The next prime is 131201420200471. The reversal of 131201420200421 is 124002024102131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11311753257025 + 119889666943396 = 3363295^2 + 10949414^2 .

It is a cyclic number.

It is not a de Polignac number, because 131201420200421 - 2¹⁰ = 131201420199397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201420200471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1205641526 + ... + 1205750343.

It is an arithmetic number, because the mean of its divisors is an integer number (32800957911675).

Almost surely, 2^{131201420200421} is an apocalyptic number.

It is an amenable number.

131201420200421 is a deficient number, since it is larger than the sum of its proper divisors (2411446279).

131201420200421 is an equidigital number, since it uses as much as digits as its factorization.

131201420200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2411446278.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 131201420200421 its reverse (124002024102131), we get a palindrome (255203444302552).

The spelling of 131201420200421 in words is "one hundred thirty-one trillion, two hundred one billion, four hundred twenty million, two hundred thousand, four hundred twenty-one".