213221242122313 has 2 divisors, whose sum is σ = 213221242122314. Its totient is φ = 213221242122312.

The previous prime is 213221242122289. The next prime is 213221242122341. The reversal of 213221242122313 is 313221242122312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136335211055289 + 76886031067024 = 11676267^2 + 8768468^2 .

It is a cyclic number.

It is not a de Polignac number, because 213221242122313 - 2²⁵ = 213221208567881 is a prime.

It is not a weakly prime, because it can be changed into another prime (213221242192313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610621061156 + 106610621061157.

It is an arithmetic number, because the mean of its divisors is an integer number (106610621061157).

Almost surely, 2^{213221242122313} is an apocalyptic number.

It is an amenable number.

213221242122313 is a deficient number, since it is larger than the sum of its proper divisors (1).

213221242122313 is an equidigital number, since it uses as much as digits as its factorization.

213221242122313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

Adding to 213221242122313 its reverse (313221242122312), we get a palindrome (526442484244625).

Subtracting 213221242122313 from its reverse (313221242122312), we obtain a palindrome (99999999999999).

The spelling of 213221242122313 in words is "two hundred thirteen trillion, two hundred twenty-one billion, two hundred forty-two million, one hundred twenty-two thousand, three hundred thirteen".