213212231333 has 4 divisors (see below), whose sum is σ = 213262988268. Its totient is φ = 213161474400.

The previous prime is 213212231329. The next prime is 213212231357. The reversal of 213212231333 is 333132212312.

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 52726262884 + 160485968449 = 229622^2 + 400607^2 .

It is a cyclic number.

It is not a de Polignac number, because 213212231333 - 2² = 213212231329 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212221333) 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, 25372166 + ... + 25380567.

It is an arithmetic number, because the mean of its divisors is an integer number (53315747067).

Almost surely, 2^213212231333 is an apocalyptic number.

It is an amenable number.

213212231333 is a deficient number, since it is larger than the sum of its proper divisors (50756935).

213212231333 is an equidigital number, since it uses as much as digits as its factorization.

213212231333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50756934.

The product of its digits is 3888, while the sum is 26.

Adding to 213212231333 its reverse (333132212312), we get a palindrome (546344443645).

The spelling of 213212231333 in words is "two hundred thirteen billion, two hundred twelve million, two hundred thirty-one thousand, three hundred thirty-three".