1001012111111 has 2 divisors, whose sum is σ = 1001012111112. Its totient is φ = 1001012111110.

The previous prime is 1001012111093. The next prime is 1001012111147. The reversal of 1001012111111 is 1111112101001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001012111111 - 2¹⁴ = 1001012094727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001012111092 and 1001012111101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001012111611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500506055555 + 500506055556.

It is an arithmetic number, because the mean of its divisors is an integer number (500506055556).

Almost surely, 2^{1001012111111} is an apocalyptic number.

1001012111111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001012111111 is an equidigital number, since it uses as much as digits as its factorization.

1001012111111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1001012111111 its reverse (1111112101001), we get a palindrome (2112124212112).

The spelling of 1001012111111 in words is "one trillion, one billion, twelve million, one hundred eleven thousand, one hundred eleven".