102020209843 has 2 divisors, whose sum is σ = 102020209844. Its totient is φ = 102020209842.

The previous prime is 102020209777. The next prime is 102020209849. The reversal of 102020209843 is 348902020201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102020209843 - 2⁹ = 102020209331 is a prime.

It is not a weakly prime, because it can be changed into another prime (102020209849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010104921 + 51010104922.

It is an arithmetic number, because the mean of its divisors is an integer number (51010104922).

Almost surely, 2^102020209843 is an apocalyptic number.

102020209843 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020209843 is an equidigital number, since it uses as much as digits as its factorization.

102020209843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 102020209843 in words is "one hundred two billion, twenty million, two hundred nine thousand, eight hundred forty-three".