121655563343 has 4 divisors (see below), whose sum is σ = 121737598248. Its totient is φ = 121573528440.

The previous prime is 121655563333. The next prime is 121655563373. The reversal of 121655563343 is 343365556121.

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 121655563343 - 2¹⁰ = 121655562319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121655563294 and 121655563303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121655563333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41015228 + ... + 41018193.

It is an arithmetic number, because the mean of its divisors is an integer number (30434399562).

Almost surely, 2^121655563343 is an apocalyptic number.

121655563343 is a deficient number, since it is larger than the sum of its proper divisors (82034905).

121655563343 is an equidigital number, since it uses as much as digits as its factorization.

121655563343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82034904.

The product of its digits is 972000, while the sum is 44.

The spelling of 121655563343 in words is "one hundred twenty-one billion, six hundred fifty-five million, five hundred sixty-three thousand, three hundred forty-three".