1001001211211 has 2 divisors, whose sum is σ = 1001001211212. Its totient is φ = 1001001211210.

The previous prime is 1001001211109. The next prime is 1001001211253. The reversal of 1001001211211 is 1121121001001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001001211211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001001211192 and 1001001211201.

It is not a weakly prime, because it can be changed into another prime (1001001211411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500500605605 + 500500605606.

It is an arithmetic number, because the mean of its divisors is an integer number (500500605606).

Almost surely, 2^{1001001211211} is an apocalyptic number.

1001001211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001001211211 is an equidigital number, since it uses as much as digits as its factorization.

1001001211211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1001001211211 its reverse (1121121001001), we get a palindrome (2122122212212).

The spelling of 1001001211211 in words is "one trillion, one billion, one million, two hundred eleven thousand, two hundred eleven".