1001222211211 has 2 divisors, whose sum is σ = 1001222211212. Its totient is φ = 1001222211210.

The previous prime is 1001222211149. The next prime is 1001222211259. The reversal of 1001222211211 is 1121122221001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001222211211 - 2⁹ = 1001222210699 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001222211271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500611105605 + 500611105606.

It is an arithmetic number, because the mean of its divisors is an integer number (500611105606).

Almost surely, 2^{1001222211211} is an apocalyptic number.

1001222211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001222211211 is an equidigital number, since it uses as much as digits as its factorization.

1001222211211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1001222211211 its reverse (1121122221001), we get a palindrome (2122344432212).

The spelling of 1001222211211 in words is "one trillion, one billion, two hundred twenty-two million, two hundred eleven thousand, two hundred eleven".