2001020111111 has 16 divisors (see below), whose sum is σ = 2292627758400. Its totient is φ = 1710850498560.

The previous prime is 2001020111093. The next prime is 2001020111113. The reversal of 2001020111111 is 1111110201002.

It is not a de Polignac number, because 2001020111111 - 2¹⁴ = 2001020094727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001020111092 and 2001020111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001020111113) 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, 23347565 + ... + 23433113.

It is an arithmetic number, because the mean of its divisors is an integer number (143289234900).

Almost surely, 2^{2001020111111} is an apocalyptic number.

2001020111111 is a deficient number, since it is larger than the sum of its proper divisors (291607647289).

2001020111111 is an equidigital number, since it uses as much as digits as its factorization.

2001020111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93914.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 2001020111111 its reverse (1111110201002), we get a palindrome (3112130312113).

The spelling of 2001020111111 in words is "two trillion, one billion, twenty million, one hundred eleven thousand, one hundred eleven".