2001220411 has 4 divisors (see below), whose sum is σ = 2001376000. Its totient is φ = 2001064824.

The previous prime is 2001220393. The next prime is 2001220421. The reversal of 2001220411 is 1140221002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001220411 - 2¹⁹ = 2000696123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001220391 and 2001220400.

It is not an unprimeable number, because it can be changed into a prime (2001220421) 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 3 ways as a sum of consecutive naturals, for example, 56571 + ... + 84868.

It is an arithmetic number, because the mean of its divisors is an integer number (500344000).

Almost surely, 2^2001220411 is an apocalyptic number.

2001220411 is a deficient number, since it is larger than the sum of its proper divisors (155589).

2001220411 is a wasteful number, since it uses less digits than its factorization.

2001220411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155588.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2001220411 is about 44735.0020789091. The cubic root of 2001220411 is about 1260.1772680381.

Adding to 2001220411 its reverse (1140221002), we get a palindrome (3141441413).

The spelling of 2001220411 in words is "two billion, one million, two hundred twenty thousand, four hundred eleven".