1020201009871 has 2 divisors, whose sum is σ = 1020201009872. Its totient is φ = 1020201009870.

The previous prime is 1020201009857. The next prime is 1020201009889. The reversal of 1020201009871 is 1789001020201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020201009871 - 2¹⁹ = 1020200485583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020201079871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510100504935 + 510100504936.

It is an arithmetic number, because the mean of its divisors is an integer number (510100504936).

Almost surely, 2^{1020201009871} is an apocalyptic number.

1020201009871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020201009871 is an equidigital number, since it uses as much as digits as its factorization.

1020201009871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 1020201009871 in words is "one trillion, twenty billion, two hundred one million, nine thousand, eight hundred seventy-one".