2001021211 has 8 divisors (see below), whose sum is σ = 2340065024. Its totient is φ = 1675273320.

The previous prime is 2001021181. The next prime is 2001021223. The reversal of 2001021211 is 1121201002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001021211 - 2⁵ = 2001021179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001021251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3323655 + ... + 3324256.

It is an arithmetic number, because the mean of its divisors is an integer number (292508128).

Almost surely, 2^2001021211 is an apocalyptic number.

2001021211 is a deficient number, since it is larger than the sum of its proper divisors (339043813).

2001021211 is an equidigital number, since it uses as much as digits as its factorization.

2001021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6647961.

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

The square root of 2001021211 is about 44732.7755789868. The cubic root of 2001021211 is about 1260.1354542795.

Adding to 2001021211 its reverse (1121201002), we get a palindrome (3122222213).

The spelling of 2001021211 in words is "two billion, one million, twenty-one thousand, two hundred eleven".