1001220102173 has 2 divisors, whose sum is σ = 1001220102174. Its totient is φ = 1001220102172.

The previous prime is 1001220102121. The next prime is 1001220102209. The reversal of 1001220102173 is 3712010221001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587157452644 + 414062649529 = 766262^2 + 643477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001220102173 - 2²² = 1001215907869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001220102073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610051086 + 500610051087.

It is an arithmetic number, because the mean of its divisors is an integer number (500610051087).

Almost surely, 2^{1001220102173} is an apocalyptic number.

It is an amenable number.

1001220102173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001220102173 is an equidigital number, since it uses as much as digits as its factorization.

1001220102173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 1001220102173 its reverse (3712010221001), we get a palindrome (4713230323174).

The spelling of 1001220102173 in words is "one trillion, one billion, two hundred twenty million, one hundred two thousand, one hundred seventy-three".