211321213234009 has 2 divisors, whose sum is σ = 211321213234010. Its totient is φ = 211321213234008.

The previous prime is 211321213234007. The next prime is 211321213234081. The reversal of 211321213234009 is 900432312123112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164126332992400 + 47194880241609 = 12811180^2 + 6869853^2 .

It is a cyclic number.

It is not a de Polignac number, because 211321213234009 - 2¹ = 211321213234007 is a prime.

Together with 211321213234007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (211321213234007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660606617004 + 105660606617005.

It is an arithmetic number, because the mean of its divisors is an integer number (105660606617005).

Almost surely, 2^{211321213234009} is an apocalyptic number.

It is an amenable number.

211321213234009 is a deficient number, since it is larger than the sum of its proper divisors (1).

211321213234009 is an equidigital number, since it uses as much as digits as its factorization.

211321213234009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 211321213234009 in words is "two hundred eleven trillion, three hundred twenty-one billion, two hundred thirteen million, two hundred thirty-four thousand, nine".