2011003213 has 4 divisors (see below), whose sum is σ = 2011260988. Its totient is φ = 2010745440.

The previous prime is 2011003207. The next prime is 2011003249. The reversal of 2011003213 is 3123001102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1497844804 + 513158409 = 38702^2 + 22653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011003213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011003193 and 2011003202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011003273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116808 + ... + 132913.

It is an arithmetic number, because the mean of its divisors is an integer number (502815247).

Almost surely, 2^2011003213 is an apocalyptic number.

It is an amenable number.

2011003213 is a deficient number, since it is larger than the sum of its proper divisors (257775).

2011003213 is an equidigital number, since it uses as much as digits as its factorization.

2011003213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257774.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2011003213 is about 44844.2104735940. The cubic root of 2011003213 is about 1262.2273555354.

Adding to 2011003213 its reverse (3123001102), we get a palindrome (5134004315).

The spelling of 2011003213 in words is "two billion, eleven million, three thousand, two hundred thirteen".