213131201213 has 16 divisors (see below), whose sum is σ = 246021238656. Its totient is φ = 180852302400.

The previous prime is 213131201203. The next prime is 213131201233. The reversal of 213131201213 is 312102131312.

It is a happy number.

It is not a de Polignac number, because 213131201213 - 2⁴ = 213131201197 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 (213131201203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7935395 + ... + 7962207.

It is an arithmetic number, because the mean of its divisors is an integer number (15376327416).

Almost surely, 2^213131201213 is an apocalyptic number.

It is an amenable number.

213131201213 is a deficient number, since it is larger than the sum of its proper divisors (32890037443).

213131201213 is a wasteful number, since it uses less digits than its factorization.

213131201213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38164.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213131201213 its reverse (312102131312), we get a palindrome (525233332525).

The spelling of 213131201213 in words is "two hundred thirteen billion, one hundred thirty-one million, two hundred one thousand, two hundred thirteen".