101200009 has 4 divisors (see below), whose sum is σ = 101623680. Its totient is φ = 100776340.

The previous prime is 101200007. The next prime is 101200051. The reversal of 101200009 is 900002101.

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 101200009 - 2¹ = 101200007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101200007) 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, 211477 + ... + 211954.

It is an arithmetic number, because the mean of its divisors is an integer number (25405920).

Almost surely, 2^101200009 is an apocalyptic number.

It is an amenable number.

101200009 is a deficient number, since it is larger than the sum of its proper divisors (423671).

101200009 is an equidigital number, since it uses as much as digits as its factorization.

101200009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423670.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 101200009 is about 10059.8215192915. The cubic root of 101200009 is about 466.0081552847.

The spelling of 101200009 in words is "one hundred one million, two hundred thousand, nine".