12021203 has 4 divisors (see below), whose sum is σ = 12543888. Its totient is φ = 11498520.

The previous prime is 12021187. The next prime is 12021259. The reversal of 12021203 is 30212021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30212021 = 7 ⋅4316003.

It is a cyclic number.

It is not a de Polignac number, because 12021203 - 2⁴ = 12021187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021403) 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, 261308 + ... + 261353.

It is an arithmetic number, because the mean of its divisors is an integer number (3135972).

Almost surely, 2^12021203 is an apocalyptic number.

12021203 is a deficient number, since it is larger than the sum of its proper divisors (522685).

12021203 is an equidigital number, since it uses as much as digits as its factorization.

12021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522684.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12021203 is about 3467.1606539069. The cubic root of 12021203 is about 229.0776101492.

Adding to 12021203 its reverse (30212021), we get a palindrome (42233224).

The spelling of 12021203 in words is "twelve million, twenty-one thousand, two hundred three".