1020200221171 has 2 divisors, whose sum is σ = 1020200221172. Its totient is φ = 1020200221170.

The previous prime is 1020200221163. The next prime is 1020200221231. The reversal of 1020200221171 is 1711220020201.

It is a weak prime.

It is an emirp because it is prime and its reverse (1711220020201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020200221171 - 2³ = 1020200221163 is a prime.

It is a super-2 number, since 2×1020200221171² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1020200227171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510100110585 + 510100110586.

It is an arithmetic number, because the mean of its divisors is an integer number (510100110586).

Almost surely, 2^{1020200221171} is an apocalyptic number.

1020200221171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020200221171 is an equidigital number, since it uses as much as digits as its factorization.

1020200221171 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 1020200221171 its reverse (1711220020201), we get a palindrome (2731420241372).

The spelling of 1020200221171 in words is "one trillion, twenty billion, two hundred million, two hundred twenty-one thousand, one hundred seventy-one".