101200111209 has 24 divisors (see below), whose sum is σ = 153727060032. Its totient is φ = 66516493680.

The previous prime is 101200111171. The next prime is 101200111213. The reversal of 101200111209 is 902111002101.

It is a happy number.

It is not a de Polignac number, because 101200111209 - 2⁷ = 101200111081 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101200111191 and 101200111200.

It is not an unprimeable number, because it can be changed into a prime (101200111219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2915574 + ... + 2950079.

It is an arithmetic number, because the mean of its divisors is an integer number (6405294168).

Almost surely, 2^101200111209 is an apocalyptic number.

It is an amenable number.

101200111209 is a deficient number, since it is larger than the sum of its proper divisors (52526948823).

101200111209 is an frugal number, since it uses more digits than its factorization.

101200111209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5865739 (or 5865727 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 101200111209 in words is "one hundred one billion, two hundred million, one hundred eleven thousand, two hundred nine".