1001021002073 has 2 divisors, whose sum is σ = 1001021002074. Its totient is φ = 1001021002072.

The previous prime is 1001021002061. The next prime is 1001021002087. The reversal of 1001021002073 is 3702001201001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 841351231504 + 159669770569 = 917252^2 + 399587^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001021002073 - 2²⁸ = 1000752566617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001021002013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500510501036 + 500510501037.

It is an arithmetic number, because the mean of its divisors is an integer number (500510501037).

Almost surely, 2^{1001021002073} is an apocalyptic number.

It is an amenable number.

1001021002073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001021002073 is an equidigital number, since it uses as much as digits as its factorization.

1001021002073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

Adding to 1001021002073 its reverse (3702001201001), we get a palindrome (4703022203074).

The spelling of 1001021002073 in words is "one trillion, one billion, twenty-one million, two thousand, seventy-three".