2121203 has 4 divisors (see below), whose sum is σ = 2424240. Its totient is φ = 1818168.

The previous prime is 2121199. The next prime is 2121239. The reversal of 2121203 is 3021212.

It is a happy number.

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 2121203 - 2² = 2121199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121253) 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, 151508 + ... + 151521.

It is an arithmetic number, because the mean of its divisors is an integer number (606060).

2^2121203 is an apocalyptic number.

2121203 is a deficient number, since it is larger than the sum of its proper divisors (303037).

2121203 is an equidigital number, since it uses as much as digits as its factorization.

2121203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303036.

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

The square root of 2121203 is about 1456.4350311634. The cubic root of 2121203 is about 128.4874601055.

Adding to 2121203 its reverse (3021212), we get a palindrome (5142415).

Subtracting 2121203 from its reverse (3021212), we obtain a palindrome (900009).

The spelling of 2121203 in words is "two million, one hundred twenty-one thousand, two hundred three".