1002001211111 has 2 divisors, whose sum is σ = 1002001211112. Its totient is φ = 1002001211110.

The previous prime is 1002001211077. The next prime is 1002001211147. The reversal of 1002001211111 is 1111121002001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002001211111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002001211092 and 1002001211101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002001211191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501000605555 + 501000605556.

It is an arithmetic number, because the mean of its divisors is an integer number (501000605556).

Almost surely, 2^{1002001211111} is an apocalyptic number.

1002001211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002001211111 is an equidigital number, since it uses as much as digits as its factorization.

1002001211111 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 1002001211111 its reverse (1111121002001), we get a palindrome (2113122213112).

The spelling of 1002001211111 in words is "one trillion, two billion, one million, two hundred eleven thousand, one hundred eleven".