101199109 has 4 divisors (see below), whose sum is σ = 110399040. Its totient is φ = 91999180.

The previous prime is 101199047. The next prime is 101199121. The reversal of 101199109 is 901991101.

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 101199109 - 2¹⁵ = 101166341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101199139) 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, 4599949 + ... + 4599970.

It is an arithmetic number, because the mean of its divisors is an integer number (27599760).

Almost surely, 2^101199109 is an apocalyptic number.

It is an amenable number.

101199109 is a deficient number, since it is larger than the sum of its proper divisors (9199931).

101199109 is an equidigital number, since it uses as much as digits as its factorization.

101199109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9199930.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 101199109 is about 10059.7767867881. The cubic root of 101199109 is about 466.0067738336.

The spelling of 101199109 in words is "one hundred one million, one hundred ninety-nine thousand, one hundred nine".