121199 has 4 divisors (see below), whose sum is σ = 130536. Its totient is φ = 111864.

The previous prime is 121189. The next prime is 121229. The reversal of 121199 is 991121.

121199 = T₁₂ + T₁₃ + ... + T₈₉.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991121 = 73 ⋅13577.

It is a cyclic number.

It is not a de Polignac number, because 121199 - 2⁸ = 120943 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121139) 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, 4649 + ... + 4674.

It is an arithmetic number, because the mean of its divisors is an integer number (32634).

2¹²¹¹⁹⁹ is an apocalyptic number.

121199 is a deficient number, since it is larger than the sum of its proper divisors (9337).

121199 is an equidigital number, since it uses as much as digits as its factorization.

121199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9336.

The product of its digits is 162, while the sum is 23.

The square root of 121199 is about 348.1364674951. The cubic root of 121199 is about 49.4879744960.

The spelling of 121199 in words is "one hundred twenty-one thousand, one hundred ninety-nine".