1001211223211 has 2 divisors, whose sum is σ = 1001211223212. Its totient is φ = 1001211223210.

The previous prime is 1001211223153. The next prime is 1001211223213. The reversal of 1001211223211 is 1123221121001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001211223211 - 2²² = 1001207028907 is a prime.

Together with 1001211223213, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001211223211.

It is not a weakly prime, because it can be changed into another prime (1001211223213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500605611605 + 500605611606.

It is an arithmetic number, because the mean of its divisors is an integer number (500605611606).

Almost surely, 2^{1001211223211} is an apocalyptic number.

1001211223211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001211223211 is an equidigital number, since it uses as much as digits as its factorization.

1001211223211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1001211223211 its reverse (1123221121001), we get a palindrome (2124432344212).

The spelling of 1001211223211 in words is "one trillion, one billion, two hundred eleven million, two hundred twenty-three thousand, two hundred eleven".