101217009 has 8 divisors (see below), whose sum is σ = 142059040. Its totient is φ = 63926496.

The previous prime is 101217007. The next prime is 101217013. The reversal of 101217009 is 900712101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101217009 - 2¹ = 101217007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101217007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887812 + ... + 887925.

It is an arithmetic number, because the mean of its divisors is an integer number (17757380).

Almost surely, 2^101217009 is an apocalyptic number.

101217009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

101217009 is a deficient number, since it is larger than the sum of its proper divisors (40842031).

101217009 is a wasteful number, since it uses less digits than its factorization.

101217009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775759.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 101217009 is about 10060.6664292183. Note that the first 3 decimals coincide. The cubic root of 101217009 is about 466.0342478222.

The spelling of 101217009 in words is "one hundred one million, two hundred seventeen thousand, nine".