101199 has 16 divisors (see below), whose sum is σ = 158720. Its totient is φ = 56160.

The previous prime is 101197. The next prime is 101203. The reversal of 101199 is 991101.

It is not a de Polignac number, because 101199 - 2¹ = 101197 is a prime.

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

It is a Duffinian number.

101199 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101197) 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, 1242 + ... + 1320.

It is an arithmetic number, because the mean of its divisors is an integer number (9920).

2¹⁰¹¹⁹⁹ is an apocalyptic number.

101199 is a deficient number, since it is larger than the sum of its proper divisors (57521).

101199 is an equidigital number, since it uses as much as digits as its factorization.

101199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150.

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

The square root of 101199 is about 318.1179026713. The cubic root of 101199 is about 46.6006606524.

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

The spelling of 101199 in words is "one hundred one thousand, one hundred ninety-nine".