213213043231 has 2 divisors, whose sum is σ = 213213043232. Its totient is φ = 213213043230.

The previous prime is 213213043229. The next prime is 213213043247. The reversal of 213213043231 is 132340312312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213213043231 - 2¹ = 213213043229 is a prime.

It is a super-2 number, since 2×213213043231² (a number of 23 digits) contains 22 as substring.

Together with 213213043229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 213213043196 and 213213043205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213213047231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106606521615 + 106606521616.

It is an arithmetic number, because the mean of its divisors is an integer number (106606521616).

Almost surely, 2^213213043231 is an apocalyptic number.

213213043231 is a deficient number, since it is larger than the sum of its proper divisors (1).

213213043231 is an equidigital number, since it uses as much as digits as its factorization.

213213043231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 213213043231 its reverse (132340312312), we get a palindrome (345553355543).

The spelling of 213213043231 in words is "two hundred thirteen billion, two hundred thirteen million, forty-three thousand, two hundred thirty-one".