102112102009 has 4 divisors (see below), whose sum is σ = 102500361216. Its totient is φ = 101723842804.

The previous prime is 102112101997. The next prime is 102112102013. The reversal of 102112102009 is 900201211201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102112102009 - 2¹⁷ = 102111970937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102112102039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194129209 + ... + 194129734.

It is an arithmetic number, because the mean of its divisors is an integer number (25625090304).

Almost surely, 2^102112102009 is an apocalyptic number.

It is an amenable number.

102112102009 is a deficient number, since it is larger than the sum of its proper divisors (388259207).

102112102009 is an equidigital number, since it uses as much as digits as its factorization.

102112102009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388259206.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 102112102009 in words is "one hundred two billion, one hundred twelve million, one hundred two thousand, nine".