2001020211 has 24 divisors (see below), whose sum is σ = 2975997024. Its totient is φ = 1294823040.

The previous prime is 2001020183. The next prime is 2001020227. The reversal of 2001020211 is 1120201002.

It is not a de Polignac number, because 2001020211 - 2¹³ = 2001012019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2001020193 and 2001020202.

It is not an unprimeable number, because it can be changed into a prime (2001020251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58930 + ... + 86456.

It is an arithmetic number, because the mean of its divisors is an integer number (123999876).

Almost surely, 2^2001020211 is an apocalyptic number.

2001020211 is a deficient number, since it is larger than the sum of its proper divisors (974976813).

2001020211 is a wasteful number, since it uses less digits than its factorization.

2001020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27771 (or 27768 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2001020211 is about 44732.7644014988. The cubic root of 2001020211 is about 1260.1352443641.

Adding to 2001020211 its reverse (1120201002), we get a palindrome (3121221213).

The spelling of 2001020211 in words is "two billion, one million, twenty thousand, two hundred eleven".