2011231213 has 8 divisors (see below), whose sum is σ = 2017423800. Its totient is φ = 2005049088.

The previous prime is 2011231207. The next prime is 2011231219. The reversal of 2011231213 is 3121321102.

It is an interprime number because it is at equal distance from previous prime (2011231207) and next prime (2011231219).

It can be written as a sum of positive squares in 4 ways, for example, as 4012009 + 2007219204 = 2003^2 + 44802^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011231213 - 2⁵ = 2011231181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011231219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540403 + ... + 544111.

It is an arithmetic number, because the mean of its divisors is an integer number (252177975).

Almost surely, 2^2011231213 is an apocalyptic number.

It is an amenable number.

2011231213 is a deficient number, since it is larger than the sum of its proper divisors (6192587).

2011231213 is an equidigital number, since it uses as much as digits as its factorization.

2011231213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2011231213 is about 44846.7525357188. The cubic root of 2011231213 is about 1262.2750559335.

Adding to 2011231213 its reverse (3121321102), we get a palindrome (5132552315).

The spelling of 2011231213 in words is "two billion, eleven million, two hundred thirty-one thousand, two hundred thirteen".