2013221213 has 4 divisors (see below), whose sum is σ = 2014860540. Its totient is φ = 2011581888.

The previous prime is 2013221167. The next prime is 2013221219. The reversal of 2013221213 is 3121223102.

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 1921770244 + 91450969 = 43838^2 + 9563^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013221213 - 2⁶ = 2013221149 is a prime.

It is a super-3 number, since 3×2013221213³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2013221191 and 2013221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013221219) 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, 817820 + ... + 820277.

It is an arithmetic number, because the mean of its divisors is an integer number (503715135).

Almost surely, 2^2013221213 is an apocalyptic number.

It is an amenable number.

2013221213 is a deficient number, since it is larger than the sum of its proper divisors (1639327).

2013221213 is a wasteful number, since it uses less digits than its factorization.

2013221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639326.

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

The square root of 2013221213 is about 44868.9337181083. The cubic root of 2013221213 is about 1262.6912353911.

Adding to 2013221213 its reverse (3121223102), we get a palindrome (5134444315).

The spelling of 2013221213 in words is "two billion, thirteen million, two hundred twenty-one thousand, two hundred thirteen".