2021033213 has 4 divisors (see below), whose sum is σ = 2070326748. Its totient is φ = 1971739680.

The previous prime is 2021033111. The next prime is 2021033243. The reversal of 2021033213 is 3123301202.

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 1070729284 + 950303929 = 32722^2 + 30827^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021033213 - 2¹² = 2021029117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021033191 and 2021033200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021033243) 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, 24646706 + ... + 24646787.

It is an arithmetic number, because the mean of its divisors is an integer number (517581687).

Almost surely, 2^2021033213 is an apocalyptic number.

It is an amenable number.

2021033213 is a deficient number, since it is larger than the sum of its proper divisors (49293535).

2021033213 is an equidigital number, since it uses as much as digits as its factorization.

2021033213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49293534.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2021033213 is about 44955.9029828119. The cubic root of 2021033213 is about 1264.3223548013.

Adding to 2021033213 its reverse (3123301202), we get a palindrome (5144334415).

The spelling of 2021033213 in words is "two billion, twenty-one million, thirty-three thousand, two hundred thirteen".