102020209943 has 2 divisors, whose sum is σ = 102020209944. Its totient is φ = 102020209942.

The previous prime is 102020209931. The next prime is 102020210053. The reversal of 102020209943 is 349902020201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102020209943 - 2¹⁰ = 102020208919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020209843) 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, 51010104971 + 51010104972.

It is an arithmetic number, because the mean of its divisors is an integer number (51010104972).

Almost surely, 2^102020209943 is an apocalyptic number.

102020209943 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020209943 is an equidigital number, since it uses as much as digits as its factorization.

102020209943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 102020209943 in words is "one hundred two billion, twenty million, two hundred nine thousand, nine hundred forty-three".