102100001009 has 4 divisors (see below), whose sum is σ = 104272341504. Its totient is φ = 99927660516.

The previous prime is 102100000979. The next prime is 102100001027. The reversal of 102100001009 is 900100001201.

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: 900100001201 = 7639 ⋅117829559.

It is a cyclic number.

It is not a de Polignac number, because 102100001009 - 2¹² = 102099996913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102100000984 and 102100001002.

It is not an unprimeable number, because it can be changed into a prime (102100001209) 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, 1086170177 + ... + 1086170270.

It is an arithmetic number, because the mean of its divisors is an integer number (26068085376).

Almost surely, 2^102100001009 is an apocalyptic number.

It is an amenable number.

102100001009 is a deficient number, since it is larger than the sum of its proper divisors (2172340495).

102100001009 is an equidigital number, since it uses as much as digits as its factorization.

102100001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172340494.

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

The spelling of 102100001009 in words is "one hundred two billion, one hundred million, one thousand, nine".