213530212621289 has 2 divisors, whose sum is σ = 213530212621290. Its totient is φ = 213530212621288.

The previous prime is 213530212621279. The next prime is 213530212621291. The reversal of 213530212621289 is 982126212035312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213041902362025 + 488310259264 = 14595955^2 + 698792^2 .

It is a cyclic number.

It is not a de Polignac number, because 213530212621289 - 2⁴ = 213530212621273 is a prime.

Together with 213530212621291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213530212621279) 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, 106765106310644 + 106765106310645.

It is an arithmetic number, because the mean of its divisors is an integer number (106765106310645).

Almost surely, 2^{213530212621289} is an apocalyptic number.

It is an amenable number.

213530212621289 is a deficient number, since it is larger than the sum of its proper divisors (1).

213530212621289 is an equidigital number, since it uses as much as digits as its factorization.

213530212621289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 213530212621289 in words is "two hundred thirteen trillion, five hundred thirty billion, two hundred twelve million, six hundred twenty-one thousand, two hundred eighty-nine".