21313112213 has 8 divisors (see below), whose sum is σ = 21558308736. Its totient is φ = 21068586000.

The previous prime is 21313112201. The next prime is 21313112267. The reversal of 21313112213 is 31221131312.

It is a happy number.

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 21313112213 - 2²² = 21308917909 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 (21313112413) 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 7 ways as a sum of consecutive naturals, for example, 103481 + ... + 230942.

It is an arithmetic number, because the mean of its divisors is an integer number (2694788592).

Almost surely, 2^21313112213 is an apocalyptic number.

It is an amenable number.

21313112213 is a deficient number, since it is larger than the sum of its proper divisors (245196523).

21313112213 is a wasteful number, since it uses less digits than its factorization.

21313112213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335155.

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

Adding to 21313112213 its reverse (31221131312), we get a palindrome (52534243525).

The spelling of 21313112213 in words is "twenty-one billion, three hundred thirteen million, one hundred twelve thousand, two hundred thirteen".