121996343 has 4 divisors (see below), whose sum is σ = 139424400. Its totient is φ = 104568288.

The previous prime is 121996319. The next prime is 121996351. The reversal of 121996343 is 343699121.

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 121996343 - 2⁸ = 121996087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121996297 and 121996306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121996543) 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, 8714018 + ... + 8714031.

It is an arithmetic number, because the mean of its divisors is an integer number (34856100).

Almost surely, 2^121996343 is an apocalyptic number.

121996343 is a deficient number, since it is larger than the sum of its proper divisors (17428057).

121996343 is an equidigital number, since it uses as much as digits as its factorization.

121996343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17428056.

The product of its digits is 34992, while the sum is 38.

The square root of 121996343 is about 11045.1954713350. The cubic root of 121996343 is about 495.9626107244.

The spelling of 121996343 in words is "one hundred twenty-one million, nine hundred ninety-six thousand, three hundred forty-three".