121339 has 4 divisors (see below), whose sum is σ = 123120. Its totient is φ = 119560.

The previous prime is 121333. The next prime is 121343. The reversal of 121339 is 933121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933121 = 7 ⋅133303.

It is a cyclic number.

It is not a de Polignac number, because 121339 - 2¹¹ = 119291 is a prime.

It is a Duffinian number.

121339 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (121333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784 + ... + 925.

It is an arithmetic number, because the mean of its divisors is an integer number (30780).

2¹²¹³³⁹ is an apocalyptic number.

121339 is a deficient number, since it is larger than the sum of its proper divisors (1781).

121339 is an equidigital number, since it uses as much as digits as its factorization.

121339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780.

The product of its digits is 162, while the sum is 19.

The square root of 121339 is about 348.3374800391. The cubic root of 121339 is about 49.5070220967.

The spelling of 121339 in words is "one hundred twenty-one thousand, three hundred thirty-nine".