131203243243441 has 4 divisors (see below), whose sum is σ = 131417277898612. Its totient is φ = 130989208588272.

The previous prime is 131203243243421. The next prime is 131203243243451. The reversal of 131203243243441 is 144342342302131.

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 63860540055841 + 67342703187600 = 7991279^2 + 8206260^2 .

It is a cyclic number.

It is not a de Polignac number, because 131203243243441 - 2²³ = 131203234854833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131203243243441.

It is not an unprimeable number, because it can be changed into a prime (131203243243421) 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, 107017326666 + ... + 107017327891.

It is an arithmetic number, because the mean of its divisors is an integer number (32854319474653).

Almost surely, 2^{131203243243441} is an apocalyptic number.

It is an amenable number.

131203243243441 is a deficient number, since it is larger than the sum of its proper divisors (214034655171).

131203243243441 is an equidigital number, since it uses as much as digits as its factorization.

131203243243441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214034655170.

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 131203243243441 its reverse (144342342302131), we get a palindrome (275545585545572).

The spelling of 131203243243441 in words is "one hundred thirty-one trillion, two hundred three billion, two hundred forty-three million, two hundred forty-three thousand, four hundred forty-one".