2011221003 has 16 divisors (see below), whose sum is σ = 3079382400. Its totient is φ = 1154767680.

The previous prime is 2011220999. The next prime is 2011221049. The reversal of 2011221003 is 3001221102.

It is not a de Polignac number, because 2011221003 - 2² = 2011220999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011221003.

It is not an unprimeable number, because it can be changed into a prime (2011221073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1603218 + ... + 1604471.

It is an arithmetic number, because the mean of its divisors is an integer number (192461400).

Almost surely, 2^2011221003 is an apocalyptic number.

2011221003 is a deficient number, since it is larger than the sum of its proper divisors (1068161397).

2011221003 is a wasteful number, since it uses less digits than its factorization.

2011221003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207722.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2011221003 is about 44846.6387034748. The cubic root of 2011221003 is about 1262.2729199533.

Adding to 2011221003 its reverse (3001221102), we get a palindrome (5012442105).

Subtracting 2011221003 from its reverse (3001221102), we obtain a palindrome (990000099).

The spelling of 2011221003 in words is "two billion, eleven million, two hundred twenty-one thousand, three".