1011001021111 has 2 divisors, whose sum is σ = 1011001021112. Its totient is φ = 1011001021110.

The previous prime is 1011001021109. The next prime is 1011001021139. The reversal of 1011001021111 is 1111201001101.

It is a weak prime.

It is an emirp because it is prime and its reverse (1111201001101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011001021111 - 2¹ = 1011001021109 is a prime.

Together with 1011001021109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011001031111) 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, 505500510555 + 505500510556.

It is an arithmetic number, because the mean of its divisors is an integer number (505500510556).

Almost surely, 2^{1011001021111} is an apocalyptic number.

1011001021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011001021111 is an equidigital number, since it uses as much as digits as its factorization.

1011001021111 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 10.

Adding to 1011001021111 its reverse (1111201001101), we get a palindrome (2122202022212).

It can be divided in two parts, 101100 and 1021111, that added together give a palindrome (1122211).

The spelling of 1011001021111 in words is "one trillion, eleven billion, one million, twenty-one thousand, one hundred eleven".