1000120021171 has 2 divisors, whose sum is σ = 1000120021172. Its totient is φ = 1000120021170.

The previous prime is 1000120021157. The next prime is 1000120021183. The reversal of 1000120021171 is 1711200210001.

It is a strong prime.

It is an emirp because it is prime and its reverse (1711200210001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000120021171 - 2²⁹ = 999583150259 is a prime.

It is a super-2 number, since 2×1000120021171² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1000120091171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500060010585 + 500060010586.

It is an arithmetic number, because the mean of its divisors is an integer number (500060010586).

Almost surely, 2^{1000120021171} is an apocalyptic number.

1000120021171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000120021171 is an equidigital number, since it uses as much as digits as its factorization.

1000120021171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 1000120021171 its reverse (1711200210001), we get a palindrome (2711320231172).

The spelling of 1000120021171 in words is "one trillion, one hundred twenty million, twenty-one thousand, one hundred seventy-one".