199101 has 16 divisors (see below), whose sum is σ = 320000. Its totient is φ = 107568.

The previous prime is 199081. The next prime is 199103. The reversal of 199101 is 101991.

199101 = T₂₃₅ + T₂₃₆ + ... + T₂₄₁.

199101 is nontrivially palindromic in base 12.

199101 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199101 - 2⁶ = 199037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

199101 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150 + ... + 648.

It is an arithmetic number, because the mean of its divisors is an integer number (20000).

2¹⁹⁹¹⁰¹ is an apocalyptic number.

It is an amenable number.

199101 is a deficient number, since it is larger than the sum of its proper divisors (120899).

199101 is a wasteful number, since it uses less digits than its factorization.

199101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 199101 is about 446.2073509031. The cubic root of 199101 is about 58.3926000820.

It can be divided in two parts, 199 and 101, that added together give a triangular number (300 = T₂₄).

The spelling of 199101 in words is "one hundred ninety-nine thousand, one hundred one".