201343342212491 has 2 divisors, whose sum is σ = 201343342212492. Its totient is φ = 201343342212490.

The previous prime is 201343342212479. The next prime is 201343342212521. The reversal of 201343342212491 is 194212243343102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201343342212491 is a prime.

It is not a weakly prime, because it can be changed into another prime (201343342212461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100671671106245 + 100671671106246.

It is an arithmetic number, because the mean of its divisors is an integer number (100671671106246).

Almost surely, 2^{201343342212491} is an apocalyptic number.

201343342212491 is a deficient number, since it is larger than the sum of its proper divisors (1).

201343342212491 is an equidigital number, since it uses as much as digits as its factorization.

201343342212491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 41.

Adding to 201343342212491 its reverse (194212243343102), we get a palindrome (395555585555593).

The spelling of 201343342212491 in words is "two hundred one trillion, three hundred forty-three billion, three hundred forty-two million, two hundred twelve thousand, four hundred ninety-one".