221341505143117 has 2 divisors, whose sum is σ = 221341505143118. Its totient is φ = 221341505143116.

The previous prime is 221341505143027. The next prime is 221341505143123. The reversal of 221341505143117 is 711341505143122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156132747005481 + 65208758137636 = 12495309^2 + 8075194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221341505143117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221341505143117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221341505143177) 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, 110670752571558 + 110670752571559.

It is an arithmetic number, because the mean of its divisors is an integer number (110670752571559).

Almost surely, 2^{221341505143117} is an apocalyptic number.

It is an amenable number.

221341505143117 is a deficient number, since it is larger than the sum of its proper divisors (1).

221341505143117 is an equidigital number, since it uses as much as digits as its factorization.

221341505143117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 221341505143117 in words is "two hundred twenty-one trillion, three hundred forty-one billion, five hundred five million, one hundred forty-three thousand, one hundred seventeen".