101310240491 has 2 divisors, whose sum is σ = 101310240492. Its totient is φ = 101310240490.

The previous prime is 101310240433. The next prime is 101310240509. The reversal of 101310240491 is 194042013101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101310240491 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101310240491.

It is not a weakly prime, because it can be changed into another prime (101310246491) 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, 50655120245 + 50655120246.

It is an arithmetic number, because the mean of its divisors is an integer number (50655120246).

Almost surely, 2^101310240491 is an apocalyptic number.

101310240491 is a deficient number, since it is larger than the sum of its proper divisors (1).

101310240491 is an equidigital number, since it uses as much as digits as its factorization.

101310240491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 101310240491 its reverse (194042013101), we get a palindrome (295352253592).

The spelling of 101310240491 in words is "one hundred one billion, three hundred ten million, two hundred forty thousand, four hundred ninety-one".