2001222220111 has 16 divisors (see below), whose sum is σ = 2115897919200. Its totient is φ = 1887483714048.

The previous prime is 2001222220103. The next prime is 2001222220117. The reversal of 2001222220111 is 1110222221002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2001222220111 - 2³ = 2001222220103 is a prime.

It is a super-3 number, since 3×2001222220111³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222220117) 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 15 ways as a sum of consecutive naturals, for example, 34576945 + ... + 34634773.

It is an arithmetic number, because the mean of its divisors is an integer number (132243619950).

Almost surely, 2^{2001222220111} is an apocalyptic number.

2001222220111 is a deficient number, since it is larger than the sum of its proper divisors (114675699089).

2001222220111 is a wasteful number, since it uses less digits than its factorization.

2001222220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65898.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2001222220111 its reverse (1110222221002), we get a palindrome (3111444441113).

The spelling of 2001222220111 in words is "two trillion, one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred eleven".