2121320213 has 8 divisors (see below), whose sum is σ = 2152743768. Its totient is φ = 2089960704.

The previous prime is 2121320209. The next prime is 2121320233. The reversal of 2121320213 is 3120231212.

It can be written as a sum of positive squares in 4 ways, for example, as 103693489 + 2017626724 = 10183^2 + 44918^2 .

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 2121320213 - 2² = 2121320209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121320191 and 2121320200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121320233) 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 7 ways as a sum of consecutive naturals, for example, 52895 + ... + 83907.

It is an arithmetic number, because the mean of its divisors is an integer number (269092971).

Almost surely, 2^2121320213 is an apocalyptic number.

It is an amenable number.

2121320213 is a deficient number, since it is larger than the sum of its proper divisors (31423555).

2121320213 is an equidigital number, since it uses as much as digits as its factorization.

2121320213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32023.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2121320213 is about 46057.7920986232. The cubic root of 2121320213 is about 1284.8982670650.

Adding to 2121320213 its reverse (3120231212), we get a palindrome (5241551425).

The spelling of 2121320213 in words is "two billion, one hundred twenty-one million, three hundred twenty thousand, two hundred thirteen".