2001201112111 has 4 divisors (see below), whose sum is σ = 2004444550512. Its totient is φ = 1997957673712.

The previous prime is 2001201112081. The next prime is 2001201112123. The reversal of 2001201112111 is 1112111021002.

It is a happy number.

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 2001201112111 - 2⁷ = 2001201111983 is a prime.

It is a super-2 number, since 2×2001201112111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001201112091 and 2001201112100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001201112151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1621718275 + ... + 1621719508.

It is an arithmetic number, because the mean of its divisors is an integer number (501111137628).

Almost surely, 2^{2001201112111} is an apocalyptic number.

2001201112111 is a deficient number, since it is larger than the sum of its proper divisors (3243438401).

2001201112111 is an equidigital number, since it uses as much as digits as its factorization.

2001201112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3243438400.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2001201112111 its reverse (1112111021002), we get a palindrome (3113312133113).

The spelling of 2001201112111 in words is "two trillion, one billion, two hundred one million, one hundred twelve thousand, one hundred eleven".