1001012221073 has 2 divisors, whose sum is σ = 1001012221074. Its totient is φ = 1001012221072.

The previous prime is 1001012221049. The next prime is 1001012221123. The reversal of 1001012221073 is 3701222101001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828806310544 + 172205910529 = 910388^2 + 414977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001012221073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1001012221373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500506110536 + 500506110537.

It is an arithmetic number, because the mean of its divisors is an integer number (500506110537).

Almost surely, 2^{1001012221073} is an apocalyptic number.

It is an amenable number.

1001012221073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001012221073 is an equidigital number, since it uses as much as digits as its factorization.

1001012221073 is an evil number, because the sum of its binary digits is even.

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

Adding to 1001012221073 its reverse (3701222101001), we get a palindrome (4702234322074).

The spelling of 1001012221073 in words is "one trillion, one billion, twelve million, two hundred twenty-one thousand, seventy-three".