231242420113 has 2 divisors, whose sum is σ = 231242420114. Its totient is φ = 231242420112.

The previous prime is 231242420111. The next prime is 231242420147. The reversal of 231242420113 is 311024242132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216734940304 + 14507479809 = 465548^2 + 120447^2 .

It is a cyclic number.

It is not a de Polignac number, because 231242420113 - 2¹ = 231242420111 is a prime.

Together with 231242420111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231242420111) 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 as a sum of consecutive naturals, namely, 115621210056 + 115621210057.

It is an arithmetic number, because the mean of its divisors is an integer number (115621210057).

Almost surely, 2^231242420113 is an apocalyptic number.

It is an amenable number.

231242420113 is a deficient number, since it is larger than the sum of its proper divisors (1).

231242420113 is an equidigital number, since it uses as much as digits as its factorization.

231242420113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 231242420113 its reverse (311024242132), we get a palindrome (542266662245).

The spelling of 231242420113 in words is "two hundred thirty-one billion, two hundred forty-two million, four hundred twenty thousand, one hundred thirteen".