121203 has 12 divisors (see below), whose sum is σ = 182280. Its totient is φ = 79596.

The previous prime is 121189. The next prime is 121229. The reversal of 121203 is 302121.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 121203 - 2⁵ = 121171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (121283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1776 + ... + 1842.

It is an arithmetic number, because the mean of its divisors is an integer number (15190).

121203 is a Friedman number, since it can be written as 3*(201*1)^2, using all its digits and the basic arithmetic operations.

2¹²¹²⁰³ is an apocalyptic number.

121203 is a deficient number, since it is larger than the sum of its proper divisors (61077).

121203 is an frugal number, since it uses more digits than its factorization.

121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 121203 is about 348.1422123213. The cubic root of 121203 is about 49.4885189167.

Multiplying 121203 by its product of nonzero digits (12), we get a square (1454436 = 1206²).

Adding to 121203 its reverse (302121), we get a palindrome (423324).

It can be divided in two parts, 121 and 203, that added together give a square (324 = 18²).

The spelling of 121203 in words is "one hundred twenty-one thousand, two hundred three", and thus it is an iban number.