2001012211 has 24 divisors (see below), whose sum is σ = 2276636544. Its totient is φ = 1755600000.

The previous prime is 2001012179. The next prime is 2001012229. The reversal of 2001012211 is 1122101002.

It is not a de Polignac number, because 2001012211 - 2⁵ = 2001012179 is a prime.

It is a super-2 number, since 2×2001012211² = 8008099737142217042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001012511) 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 23 ways as a sum of consecutive naturals, for example, 2629071 + ... + 2629831.

It is an arithmetic number, because the mean of its divisors is an integer number (94859856).

Almost surely, 2^2001012211 is an apocalyptic number.

2001012211 is a deficient number, since it is larger than the sum of its proper divisors (275624333).

2001012211 is a wasteful number, since it uses less digits than its factorization.

2001012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2001012211 is about 44732.6749814942. The cubic root of 2001012211 is about 1260.1335650382.

Adding to 2001012211 its reverse (1122101002), we get a palindrome (3123113213).

The spelling of 2001012211 in words is "two billion, one million, twelve thousand, two hundred eleven".