131241232501 has 2 divisors, whose sum is σ = 131241232502. Its totient is φ = 131241232500.

The previous prime is 131241232487. The next prime is 131241232559. The reversal of 131241232501 is 105232142131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115463360401 + 15777872100 = 339799^2 + 125610^2 .

It is an emirp because it is prime and its reverse (105232142131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131241232501 - 2²³ = 131232843893 is a prime.

It is a super-2 number, since 2×131241232501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131241232571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65620616250 + 65620616251.

It is an arithmetic number, because the mean of its divisors is an integer number (65620616251).

Almost surely, 2^131241232501 is an apocalyptic number.

It is an amenable number.

131241232501 is a deficient number, since it is larger than the sum of its proper divisors (1).

131241232501 is an equidigital number, since it uses as much as digits as its factorization.

131241232501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 131241232501 its reverse (105232142131), we get a palindrome (236473374632).

The spelling of 131241232501 in words is "one hundred thirty-one billion, two hundred forty-one million, two hundred thirty-two thousand, five hundred one".