121843321 has 2 divisors, whose sum is σ = 121843322. Its totient is φ = 121843320.

The previous prime is 121843307. The next prime is 121843363. The reversal of 121843321 is 123348121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83539600 + 38303721 = 9140^2 + 6189^2 .

It is a cyclic number.

It is not a de Polignac number, because 121843321 - 2¹⁷ = 121712249 is a prime.

It is not a weakly prime, because it can be changed into another prime (121843391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60921660 + 60921661.

It is an arithmetic number, because the mean of its divisors is an integer number (60921661).

Almost surely, 2^121843321 is an apocalyptic number.

It is an amenable number.

121843321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121843321 is an equidigital number, since it uses as much as digits as its factorization.

121843321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 121843321 is about 11038.2662134957. The cubic root of 121843321 is about 495.7551593034.

The spelling of 121843321 in words is "one hundred twenty-one million, eight hundred forty-three thousand, three hundred twenty-one".