2001100222111 has 16 divisors (see below), whose sum is σ = 2016987955200. Its totient is φ = 1985265628128.

The previous prime is 2001100222097. The next prime is 2001100222123. The reversal of 2001100222111 is 1112220011002.

It is a cyclic number.

It is not a de Polignac number, because 2001100222111 - 2⁹ = 2001100221599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001100222091 and 2001100222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001100222411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302323360 + ... + 302329978.

It is an arithmetic number, because the mean of its divisors is an integer number (126061747200).

Almost surely, 2^{2001100222111} is an apocalyptic number.

2001100222111 is a deficient number, since it is larger than the sum of its proper divisors (15887733089).

2001100222111 is a wasteful number, since it uses less digits than its factorization.

2001100222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10278.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001100222111 its reverse (1112220011002), we get a palindrome (3113320233113).

The spelling of 2001100222111 in words is "two trillion, one billion, one hundred million, two hundred twenty-two thousand, one hundred eleven".