1001221020271 has 2 divisors, whose sum is σ = 1001221020272. Its totient is φ = 1001221020270.

The previous prime is 1001221020221. The next prime is 1001221020299. The reversal of 1001221020271 is 1720201221001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001221020271 - 2⁹ = 1001221019759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001221020221) 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, 500610510135 + 500610510136.

It is an arithmetic number, because the mean of its divisors is an integer number (500610510136).

Almost surely, 2^{1001221020271} is an apocalyptic number.

1001221020271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001221020271 is an equidigital number, since it uses as much as digits as its factorization.

1001221020271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 1001221020271 its reverse (1720201221001), we get a palindrome (2721422241272).

The spelling of 1001221020271 in words is "one trillion, one billion, two hundred twenty-one million, twenty thousand, two hundred seventy-one".