2001011211 has 12 divisors (see below), whose sum is σ = 2898542088. Its totient is φ = 1330226304.

The previous prime is 2001011203. The next prime is 2001011251. The reversal of 2001011211 is 1121101002.

It is a happy number.

It is not a de Polignac number, because 2001011211 - 2³ = 2001011203 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 = 2001011193 and 2001011202.

It is not an unprimeable number, because it can be changed into a prime (2001011251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311745 + ... + 318098.

It is an arithmetic number, because the mean of its divisors is an integer number (241545174).

Almost surely, 2^2001011211 is an apocalyptic number.

2001011211 is a deficient number, since it is larger than the sum of its proper divisors (897530877).

2001011211 is a wasteful number, since it uses less digits than its factorization.

2001011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630202 (or 630199 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2001011211 is about 44732.6638039811. The cubic root of 2001011211 is about 1260.1333551221.

Adding to 2001011211 its reverse (1121101002), we get a palindrome (3122112213).

The spelling of 2001011211 in words is "two billion, one million, eleven thousand, two hundred eleven".