202130400209 has 2 divisors, whose sum is σ = 202130400210. Its totient is φ = 202130400208.

The previous prime is 202130400203. The next prime is 202130400239. The reversal of 202130400209 is 902004031202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143411417809 + 58718982400 = 378697^2 + 242320^2 .

It is a cyclic number.

It is not a de Polignac number, because 202130400209 - 2⁸ = 202130399953 is a prime.

It is not a weakly prime, because it can be changed into another prime (202130400203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101065200104 + 101065200105.

It is an arithmetic number, because the mean of its divisors is an integer number (101065200105).

Almost surely, 2^202130400209 is an apocalyptic number.

It is an amenable number.

202130400209 is a deficient number, since it is larger than the sum of its proper divisors (1).

202130400209 is an equidigital number, since it uses as much as digits as its factorization.

202130400209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The spelling of 202130400209 in words is "two hundred two billion, one hundred thirty million, four hundred thousand, two hundred nine".