2001220011111 has 32 divisors (see below), whose sum is σ = 2838685022208. Its totient is φ = 1249708608000.

The previous prime is 2001220011107. The next prime is 2001220011149. The reversal of 2001220011111 is 1111100221002.

It is not a de Polignac number, because 2001220011111 - 2² = 2001220011107 is a prime.

It is a super-2 number, since 2×2001220011111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001220011311) 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 in 31 ways as a sum of consecutive naturals, for example, 11133030 + ... + 11311356.

It is an arithmetic number, because the mean of its divisors is an integer number (88708906944).

Almost surely, 2^{2001220011111} is an apocalyptic number.

2001220011111 is a deficient number, since it is larger than the sum of its proper divisors (837465011097).

2001220011111 is a wasteful number, since it uses less digits than its factorization.

2001220011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179391.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2001220011111 its reverse (1111100221002), we get a palindrome (3112320232113).

The spelling of 2001220011111 in words is "two trillion, one billion, two hundred twenty million, eleven thousand, one hundred eleven".