213212021133 has 4 divisors (see below), whose sum is σ = 284282694848. Its totient is φ = 142141347420.

The previous prime is 213212021089. The next prime is 213212021153. The reversal of 213212021133 is 331120212312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213212021133 - 2¹⁷ = 213211890061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212021153) 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, 35535336853 + ... + 35535336858.

It is an arithmetic number, because the mean of its divisors is an integer number (71070673712).

Almost surely, 2^213212021133 is an apocalyptic number.

It is an amenable number.

213212021133 is a deficient number, since it is larger than the sum of its proper divisors (71070673715).

213212021133 is an equidigital number, since it uses as much as digits as its factorization.

213212021133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71070673714.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213212021133 its reverse (331120212312), we get a palindrome (544332233445).

The spelling of 213212021133 in words is "two hundred thirteen billion, two hundred twelve million, twenty-one thousand, one hundred thirty-three".