10102001009 has 4 divisors (see below), whose sum is σ = 10122246000. Its totient is φ = 10081756020.

The previous prime is 10102000939. The next prime is 10102001017. The reversal of 10102001009 is 90010020101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90010020101 = 19 ⋅4737369479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10102001009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10102000984 and 10102001002.

It is not an unprimeable number, because it can be changed into a prime (10102001089) 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, 10121747 + ... + 10122744.

It is an arithmetic number, because the mean of its divisors is an integer number (2530561500).

Almost surely, 2^10102001009 is an apocalyptic number.

It is an amenable number.

10102001009 is a deficient number, since it is larger than the sum of its proper divisors (20244991).

10102001009 is an equidigital number, since it uses as much as digits as its factorization.

10102001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20244990.

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 10102001009 in words is "ten billion, one hundred two million, one thousand, nine".