213024420209 has 2 divisors, whose sum is σ = 213024420210. Its totient is φ = 213024420208.

The previous prime is 213024420151. The next prime is 213024420251. The reversal of 213024420209 is 902024420312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211181607025 + 1842813184 = 459545^2 + 42928^2 .

It is a cyclic number.

It is not a de Polignac number, because 213024420209 - 2²⁰ = 213023371633 is a prime.

It is not a weakly prime, because it can be changed into another prime (213024420109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106512210104 + 106512210105.

It is an arithmetic number, because the mean of its divisors is an integer number (106512210105).

Almost surely, 2^213024420209 is an apocalyptic number.

It is an amenable number.

213024420209 is a deficient number, since it is larger than the sum of its proper divisors (1).

213024420209 is an equidigital number, since it uses as much as digits as its factorization.

213024420209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 213024420209 in words is "two hundred thirteen billion, twenty-four million, four hundred twenty thousand, two hundred nine".