213240044231213 has 2 divisors, whose sum is σ = 213240044231214. Its totient is φ = 213240044231212.

The previous prime is 213240044231191. The next prime is 213240044231231. The reversal of 213240044231213 is 312132440042312.

It is a happy number.

Together with next prime (213240044231231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107659446072649 + 105580598158564 = 10375907^2 + 10275242^2 .

It is a cyclic number.

It is not a de Polignac number, because 213240044231213 - 2¹⁰ = 213240044230189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213240044231213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213240044201213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106620022115606 + 106620022115607.

It is an arithmetic number, because the mean of its divisors is an integer number (106620022115607).

Almost surely, 2^{213240044231213} is an apocalyptic number.

It is an amenable number.

213240044231213 is a deficient number, since it is larger than the sum of its proper divisors (1).

213240044231213 is an equidigital number, since it uses as much as digits as its factorization.

213240044231213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 213240044231213 its reverse (312132440042312), we get a palindrome (525372484273525).

The spelling of 213240044231213 in words is "two hundred thirteen trillion, two hundred forty billion, forty-four million, two hundred thirty-one thousand, two hundred thirteen".