11333212021 has 4 divisors (see below), whose sum is σ = 11519002444. Its totient is φ = 11147421600.

The previous prime is 11333212019. The next prime is 11333212031. The reversal of 11333212021 is 12021233311.

11333212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12021233311 = 167 ⋅71983433.

It can be written as a sum of positive squares in 2 ways, for example, as 1407075121 + 9926136900 = 37511^2 + 99630^2 .

It is a cyclic number.

It is not a de Polignac number, because 11333212021 - 2¹ = 11333212019 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 11333212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11333212031) 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 3 ways as a sum of consecutive naturals, for example, 92895120 + ... + 92895241.

It is an arithmetic number, because the mean of its divisors is an integer number (2879750611).

Almost surely, 2^11333212021 is an apocalyptic number.

It is an amenable number.

11333212021 is a deficient number, since it is larger than the sum of its proper divisors (185790423).

11333212021 is an equidigital number, since it uses as much as digits as its factorization.

11333212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185790422.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11333212021 its reverse (12021233311), we get a palindrome (23354445332).

The spelling of 11333212021 in words is "eleven billion, three hundred thirty-three million, two hundred twelve thousand, twenty-one".