121383 has 6 divisors (see below), whose sum is σ = 175344. Its totient is φ = 80916.

The previous prime is 121379. The next prime is 121403. The reversal of 121383 is 383121.

121383 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 121383 - 2² = 121379 is a prime.

121383 is a lucky number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6735 + ... + 6752.

It is an arithmetic number, because the mean of its divisors is an integer number (29224).

2¹²¹³⁸³ is an apocalyptic number.

121383 is a deficient number, since it is larger than the sum of its proper divisors (53961).

121383 is a wasteful number, since it uses less digits than its factorization.

121383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13493 (or 13490 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121383 is about 348.4006314575. The cubic root of 121383 is about 49.5130054593.

It can be divided in two parts, 1213 and 83, that added together give a 4-th power (1296 = 6⁴).

The spelling of 121383 in words is "one hundred twenty-one thousand, three hundred eighty-three".