102000031209 has 12 divisors (see below), whose sum is σ = 147877047552. Its totient is φ = 67749096600.

The previous prime is 102000031193. The next prime is 102000031249. The reversal of 102000031209 is 902130000201.

It is a happy number.

It is not a de Polignac number, because 102000031209 - 2⁴ = 102000031193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102000031191 and 102000031200.

It is not an unprimeable number, because it can be changed into a prime (102000031249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20907777 + ... + 20912654.

It is an arithmetic number, because the mean of its divisors is an integer number (12323087296).

Almost surely, 2^102000031209 is an apocalyptic number.

It is an amenable number.

102000031209 is a deficient number, since it is larger than the sum of its proper divisors (45877016343).

102000031209 is a wasteful number, since it uses less digits than its factorization.

102000031209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41820708 (or 41820705 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The spelling of 102000031209 in words is "one hundred two billion, thirty-one thousand, two hundred nine".