2021223133 has 4 divisors (see below), whose sum is σ = 2021357308. Its totient is φ = 2021088960.

The previous prime is 2021223131. The next prime is 2021223277. The reversal of 2021223133 is 3313221202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3313221202 = 2 ⋅1656610601.

It can be written as a sum of positive squares in 2 ways, for example, as 82846404 + 1938376729 = 9102^2 + 44027^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021223133 - 2¹ = 2021223131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021223133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021223131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41148 + ... + 75733.

It is an arithmetic number, because the mean of its divisors is an integer number (505339327).

Almost surely, 2^2021223133 is an apocalyptic number.

It is an amenable number.

2021223133 is a deficient number, since it is larger than the sum of its proper divisors (134175).

2021223133 is a wasteful number, since it uses less digits than its factorization.

2021223133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134174.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 2021223133 is about 44958.0152253188. The cubic root of 2021223133 is about 1264.3619570831.

Adding to 2021223133 its reverse (3313221202), we get a palindrome (5334444335).

The spelling of 2021223133 in words is "two billion, twenty-one million, two hundred twenty-three thousand, one hundred thirty-three".