1122001221001 has 2 divisors, whose sum is σ = 1122001221002. Its totient is φ = 1122001221000.

The previous prime is 1122001220987. The next prime is 1122001221023. The reversal of 1122001221001 is 1001221002211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 769788645376 + 352212575625 = 877376^2 + 593475^2 .

It is an emirp because it is prime and its reverse (1001221002211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1122001221001 - 2²⁵ = 1121967666569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122001221031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561000610500 + 561000610501.

It is an arithmetic number, because the mean of its divisors is an integer number (561000610501).

Almost surely, 2^{1122001221001} is an apocalyptic number.

It is an amenable number.

1122001221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122001221001 is an equidigital number, since it uses as much as digits as its factorization.

1122001221001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1122001221001 its reverse (1001221002211), we get a palindrome (2123222223212).

The spelling of 1122001221001 in words is "one trillion, one hundred twenty-two billion, one million, two hundred twenty-one thousand, one".