121398383 has 4 divisors (see below), whose sum is σ = 121470168. Its totient is φ = 121326600.

The previous prime is 121398323. The next prime is 121398401. The reversal of 121398383 is 383893121.

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 121398383 - 2¹⁰ = 121397359 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 (121398323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33293 + ... + 36758.

It is an arithmetic number, because the mean of its divisors is an integer number (30367542).

Almost surely, 2^121398383 is an apocalyptic number.

121398383 is a deficient number, since it is larger than the sum of its proper divisors (71785).

121398383 is an equidigital number, since it uses as much as digits as its factorization.

121398383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71784.

The product of its digits is 31104, while the sum is 38.

The square root of 121398383 is about 11018.0934376143. The cubic root of 121398383 is about 495.1509698338.

The spelling of 121398383 in words is "one hundred twenty-one million, three hundred ninety-eight thousand, three hundred eighty-three".