1001221322263 has 2 divisors, whose sum is σ = 1001221322264. Its totient is φ = 1001221322262.

The previous prime is 1001221322207. The next prime is 1001221322323. The reversal of 1001221322263 is 3622231221001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001221322263 - 2²⁵ = 1001187767831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001221322063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610661131 + 500610661132.

It is an arithmetic number, because the mean of its divisors is an integer number (500610661132).

Almost surely, 2^{1001221322263} is an apocalyptic number.

1001221322263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001221322263 is an equidigital number, since it uses as much as digits as its factorization.

1001221322263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1001221322263 its reverse (3622231221001), we get a palindrome (4623452543264).

The spelling of 1001221322263 in words is "one trillion, one billion, two hundred twenty-one million, three hundred twenty-two thousand, two hundred sixty-three".