121299 has 4 divisors (see below), whose sum is σ = 161736. Its totient is φ = 80864.

The previous prime is 121291. The next prime is 121309. The reversal of 121299 is 992121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121299 - 2³ = 121291 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (121291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20214 + ... + 20219.

It is an arithmetic number, because the mean of its divisors is an integer number (40434).

2¹²¹²⁹⁹ is an apocalyptic number.

121299 is a deficient number, since it is larger than the sum of its proper divisors (40437).

121299 is an equidigital number, since it uses as much as digits as its factorization.

121299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40436.

The product of its digits is 324, while the sum is 24.

The square root of 121299 is about 348.2800597221. The cubic root of 121299 is about 49.5015814208.

The spelling of 121299 in words is "one hundred twenty-one thousand, two hundred ninety-nine".