2001011011111 has 4 divisors (see below), whose sum is σ = 2286869726992. Its totient is φ = 1715152295232.

The previous prime is 2001011011091. The next prime is 2001011011157. The reversal of 2001011011111 is 1111101101002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001011011111 - 2⁹ = 2001011010599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001011017111) 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 in 3 ways as a sum of consecutive naturals, for example, 142929357930 + ... + 142929357943.

It is an arithmetic number, because the mean of its divisors is an integer number (571717431748).

Almost surely, 2^{2001011011111} is an apocalyptic number.

2001011011111 is a deficient number, since it is larger than the sum of its proper divisors (285858715881).

2001011011111 is an equidigital number, since it uses as much as digits as its factorization.

2001011011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285858715880.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 2001011011111 its reverse (1111101101002), we get a palindrome (3112112112113).

The spelling of 2001011011111 in words is "two trillion, one billion, eleven million, eleven thousand, one hundred eleven".