1701042587221 has 2 divisors, whose sum is σ = 1701042587222. Its totient is φ = 1701042587220.

The previous prime is 1701042587207. The next prime is 1701042587261. The reversal of 1701042587221 is 1227852401071.

It is an a-pointer prime, because the next prime (1701042587261) can be obtained adding 1701042587221 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1094871342321 + 606171244900 = 1046361^2 + 778570^2 .

It is an emirp because it is prime and its reverse (1227852401071) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1701042587221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1701042587201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 850521293610 + 850521293611.

It is an arithmetic number, because the mean of its divisors is an integer number (850521293611).

Almost surely, 2^{1701042587221} is an apocalyptic number.

It is an amenable number.

1701042587221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1701042587221 is an equidigital number, since it uses as much as digits as its factorization.

1701042587221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 40.

Adding to 1701042587221 its reverse (1227852401071), we get a palindrome (2928894988292).

The spelling of 1701042587221 in words is "one trillion, seven hundred one billion, forty-two million, five hundred eighty-seven thousand, two hundred twenty-one".