131201203241421 has 6 divisors (see below), whose sum is σ = 189512849126510. Its totient is φ = 87467468827608.

The previous prime is 131201203241369. The next prime is 131201203241489. The reversal of 131201203241421 is 124142302102131.

131201203241421 is a `hidden beast` number, since 1 + 3 + 1 + 20 + 1 + 203 + 2 + 414 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 129261550955625 + 1939652285796 = 11369325^2 + 1392714^2 .

It is not a de Polignac number, because 131201203241421 - 2⁷ = 131201203241293 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 (131201203241221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7288955735626 + ... + 7288955735643.

Almost surely, 2^{131201203241421} is an apocalyptic number.

It is an amenable number.

131201203241421 is a deficient number, since it is larger than the sum of its proper divisors (58311645885089).

131201203241421 is a wasteful number, since it uses less digits than its factorization.

131201203241421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14577911471275 (or 14577911471272 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 131201203241421 its reverse (124142302102131), we get a palindrome (255343505343552).

The spelling of 131201203241421 in words is "one hundred thirty-one trillion, two hundred one billion, two hundred three million, two hundred forty-one thousand, four hundred twenty-one".