12121203 has 4 divisors (see below), whose sum is σ = 16161608. Its totient is φ = 8080800.

The previous prime is 12121157. The next prime is 12121211. The reversal of 12121203 is 30212121.

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

It is not a de Polignac number, because 12121203 - 2⁸ = 12120947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121273) 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, 2020198 + ... + 2020203.

It is an arithmetic number, because the mean of its divisors is an integer number (4040402).

Almost surely, 2^12121203 is an apocalyptic number.

12121203 is a deficient number, since it is larger than the sum of its proper divisors (4040405).

12121203 is an equidigital number, since it uses as much as digits as its factorization.

12121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040404.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12121203 is about 3481.5518091793. The cubic root of 12121203 is about 229.7110612417.

Adding to 12121203 its reverse (30212121), we get a palindrome (42333324).

It can be divided in two parts, 1212 and 1203, that added together give a triangular number (2415 = T₆₉).

The spelling of 12121203 in words is "twelve million, one hundred twenty-one thousand, two hundred three".