1001222001001 has 2 divisors, whose sum is σ = 1001222001002. Its totient is φ = 1001222001000.

The previous prime is 1001222000971. The next prime is 1001222001007. The reversal of 1001222001001 is 1001002221001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 768296075625 + 232925925376 = 876525^2 + 482624^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001222001001 - 2³⁷ = 863783047529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001222001007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500611000500 + 500611000501.

It is an arithmetic number, because the mean of its divisors is an integer number (500611000501).

Almost surely, 2^{1001222001001} is an apocalyptic number.

It is an amenable number.

1001222001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001222001001 is an equidigital number, since it uses as much as digits as its factorization.

1001222001001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1001222001001 its reverse (1001002221001), we get a palindrome (2002224222002).

The spelling of 1001222001001 in words is "one trillion, one billion, two hundred twenty-two million, one thousand, one".