213120013231 has 2 divisors, whose sum is σ = 213120013232. Its totient is φ = 213120013230.

The previous prime is 213120013187. The next prime is 213120013289. The reversal of 213120013231 is 132310021312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213120013231 - 2¹¹ = 213120011183 is a prime.

It is a super-2 number, since 2×213120013231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213120013199 and 213120013208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213120013031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560006615 + 106560006616.

It is an arithmetic number, because the mean of its divisors is an integer number (106560006616).

Almost surely, 2^213120013231 is an apocalyptic number.

213120013231 is a deficient number, since it is larger than the sum of its proper divisors (1).

213120013231 is an equidigital number, since it uses as much as digits as its factorization.

213120013231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 213120013231 its reverse (132310021312), we get a palindrome (345430034543).

The spelling of 213120013231 in words is "two hundred thirteen billion, one hundred twenty million, thirteen thousand, two hundred thirty-one".