213121303213 has 32 divisors (see below), whose sum is σ = 265011667200. Its totient is φ = 166883673600.

The previous prime is 213121303207. The next prime is 213121303273. The reversal of 213121303213 is 312303121312.

It is not a de Polignac number, because 213121303213 - 2⁵ = 213121303181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121303273) 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 31 ways as a sum of consecutive naturals, for example, 37671081 + ... + 37676737.

It is an arithmetic number, because the mean of its divisors is an integer number (8281614600).

Almost surely, 2^213121303213 is an apocalyptic number.

It is an amenable number.

213121303213 is a deficient number, since it is larger than the sum of its proper divisors (51890363987).

213121303213 is a wasteful number, since it uses less digits than its factorization.

213121303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9877.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213121303213 its reverse (312303121312), we get a palindrome (525424424525).

The spelling of 213121303213 in words is "two hundred thirteen billion, one hundred twenty-one million, three hundred three thousand, two hundred thirteen".