102011020209 has 12 divisors (see below), whose sum is σ = 168399144576. Its totient is φ = 58292011512.

The previous prime is 102011020207. The next prime is 102011020211. The reversal of 102011020209 is 902020110201.

It is an interprime number because it is at equal distance from previous prime (102011020207) and next prime (102011020211).

It is not a de Polignac number, because 102011020209 - 2¹ = 102011020207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102011020191 and 102011020200.

It is not an unprimeable number, because it can be changed into a prime (102011020207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 809611209 + ... + 809611334.

It is an arithmetic number, because the mean of its divisors is an integer number (14033262048).

Almost surely, 2^102011020209 is an apocalyptic number.

It is an amenable number.

102011020209 is a deficient number, since it is larger than the sum of its proper divisors (66388124367).

102011020209 is a wasteful number, since it uses less digits than its factorization.

102011020209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619222556 (or 1619222553 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 102011020209 in words is "one hundred two billion, eleven million, twenty thousand, two hundred nine".