213133012021 has 8 divisors (see below), whose sum is σ = 213985519704. Its totient is φ = 212282008320.

The previous prime is 213133012013. The next prime is 213133012087. The reversal of 213133012021 is 120210331312.

It can be written as a sum of positive squares in 4 ways, for example, as 20877071121 + 192255940900 = 144489^2 + 438470^2 .

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 213133012021 - 2³ = 213133012013 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 213133012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213133012621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91576 + ... + 659281.

It is an arithmetic number, because the mean of its divisors is an integer number (26748189963).

Almost surely, 2^213133012021 is an apocalyptic number.

It is an amenable number.

213133012021 is a deficient number, since it is larger than the sum of its proper divisors (852507683).

213133012021 is an equidigital number, since it uses as much as digits as its factorization.

213133012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751991.

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

Adding to 213133012021 its reverse (120210331312), we get a palindrome (333343343333).

The spelling of 213133012021 in words is "two hundred thirteen billion, one hundred thirty-three million, twelve thousand, twenty-one".