2001220001111 has 16 divisors (see below), whose sum is σ = 2015583562080. Its totient is φ = 1986903367680.

The previous prime is 2001220001093. The next prime is 2001220001219. The reversal of 2001220001111 is 1111000221002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001220001111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001220001092 and 2001220001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001220021111) 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, 218445371 + ... + 218454531.

It is an arithmetic number, because the mean of its divisors is an integer number (125973972630).

Almost surely, 2^{2001220001111} is an apocalyptic number.

2001220001111 is a deficient number, since it is larger than the sum of its proper divisors (14363560969).

2001220001111 is a wasteful number, since it uses less digits than its factorization.

2001220001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11554.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2001220001111 its reverse (1111000221002), we get a palindrome (3112220222113).

The spelling of 2001220001111 in words is "two trillion, one billion, two hundred twenty million, one thousand, one hundred eleven".