121943 has 4 divisors (see below), whose sum is σ = 122760. Its totient is φ = 121128.

The previous prime is 121937. The next prime is 121949. The reversal of 121943 is 349121.

121943 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (121937) and next prime (121949).

It is a cyclic number.

It is not a de Polignac number, because 121943 - 2⁸ = 121687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121949) 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, 113 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (30690).

2¹²¹⁹⁴³ is an apocalyptic number.

121943 is a deficient number, since it is larger than the sum of its proper divisors (817).

121943 is an equidigital number, since it uses as much as digits as its factorization.

121943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its digits is 216, while the sum is 20.

The square root of 121943 is about 349.2033791360. The cubic root of 121943 is about 49.5890313501.

The spelling of 121943 in words is "one hundred twenty-one thousand, nine hundred forty-three".