121683355 has 4 divisors (see below), whose sum is σ = 146020032. Its totient is φ = 97346680.

The previous prime is 121683347. The next prime is 121683361. The reversal of 121683355 is 553386121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121683355 - 2³ = 121683347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121683355.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12168331 + ... + 12168340.

It is an arithmetic number, because the mean of its divisors is an integer number (36505008).

Almost surely, 2^121683355 is an apocalyptic number.

121683355 is a deficient number, since it is larger than the sum of its proper divisors (24336677).

121683355 is an equidigital number, since it uses as much as digits as its factorization.

121683355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24336676.

The product of its digits is 21600, while the sum is 34.

The square root of 121683355 is about 11031.0178587472. The cubic root of 121683355 is about 495.5381081482.

The spelling of 121683355 in words is "one hundred twenty-one million, six hundred eighty-three thousand, three hundred fifty-five".