213120332309 has 2 divisors, whose sum is σ = 213120332310. Its totient is φ = 213120332308.

The previous prime is 213120332303. The next prime is 213120332351. The reversal of 213120332309 is 903233021312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209469151684 + 3651180625 = 457678^2 + 60425^2 .

It is a cyclic number.

It is not a de Polignac number, because 213120332309 - 2³² = 208825365013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213120332303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560166154 + 106560166155.

It is an arithmetic number, because the mean of its divisors is an integer number (106560166155).

Almost surely, 2^213120332309 is an apocalyptic number.

It is an amenable number.

213120332309 is a deficient number, since it is larger than the sum of its proper divisors (1).

213120332309 is an equidigital number, since it uses as much as digits as its factorization.

213120332309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 213120332309 in words is "two hundred thirteen billion, one hundred twenty million, three hundred thirty-two thousand, three hundred nine".