2001111123211 has 8 divisors (see below), whose sum is σ = 2050367757984. Its totient is φ = 1951875871680.

The previous prime is 2001111123173. The next prime is 2001111123247. The reversal of 2001111123211 is 1123211111002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001111123211 - 2²⁷ = 2000976905483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001111123811) 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 in 7 ways as a sum of consecutive naturals, for example, 5156260 + ... + 5530753.

It is an arithmetic number, because the mean of its divisors is an integer number (256295969748).

Almost surely, 2^{2001111123211} is an apocalyptic number.

2001111123211 is a deficient number, since it is larger than the sum of its proper divisors (49256634773).

2001111123211 is a wasteful number, since it uses less digits than its factorization.

2001111123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10691621.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 2001111123211 its reverse (1123211111002), we get a palindrome (3124322234213).

The spelling of 2001111123211 in words is "two trillion, one billion, one hundred eleven million, one hundred twenty-three thousand, two hundred eleven".