2001220012111 has 2 divisors, whose sum is σ = 2001220012112. Its totient is φ = 2001220012110.

The previous prime is 2001220012079. The next prime is 2001220012123. The reversal of 2001220012111 is 1112100221002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001220012111 - 2⁵ = 2001220012079 is a prime.

It is a super-3 number, since 3×2001220012111³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001220012091 and 2001220012100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001220012171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610006055 + 1000610006056.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610006056).

Almost surely, 2^{2001220012111} is an apocalyptic number.

2001220012111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220012111 is an equidigital number, since it uses as much as digits as its factorization.

2001220012111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2001220012111 its reverse (1112100221002), we get a palindrome (3113320233113).

The spelling of 2001220012111 in words is "two trillion, one billion, two hundred twenty million, twelve thousand, one hundred eleven".