2002021211 has 4 divisors (see below), whose sum is σ = 2004953112. Its totient is φ = 1999089312.

The previous prime is 2002021207. The next prime is 2002021213. The reversal of 2002021211 is 1121202002.

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 2002021211 - 2² = 2002021207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002021192 and 2002021201.

It is not an unprimeable number, because it can be changed into a prime (2002021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464926 + ... + 1466291.

It is an arithmetic number, because the mean of its divisors is an integer number (501238278).

Almost surely, 2^2002021211 is an apocalyptic number.

2002021211 is a deficient number, since it is larger than the sum of its proper divisors (2931901).

2002021211 is an equidigital number, since it uses as much as digits as its factorization.

2002021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931900.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2002021211 is about 44743.9516694715. The cubic root of 2002021211 is about 1260.3453347130.

Adding to 2002021211 its reverse (1121202002), we get a palindrome (3123223213).

The spelling of 2002021211 in words is "two billion, two million, twenty-one thousand, two hundred eleven".