1212203 has 4 divisors (see below), whose sum is σ = 1223640. Its totient is φ = 1200768.

The previous prime is 1212199. The next prime is 1212221. The reversal of 1212203 is 3022121.

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: 3022121 = 19 ⋅159059.

It is a cyclic number.

It is not a de Polignac number, because 1212203 - 2² = 1212199 is a prime.

It is a super-2 number, since 2×1212203² = 2938872226418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5558 + ... + 5771.

It is an arithmetic number, because the mean of its divisors is an integer number (305910).

2^1212203 is an apocalyptic number.

1212203 is a deficient number, since it is larger than the sum of its proper divisors (11437).

1212203 is a wasteful number, since it uses less digits than its factorization.

1212203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11436.

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

The square root of 1212203 is about 1101.0009082648. Note that the first 3 decimals coincide. The cubic root of 1212203 is about 106.6248544890.

Adding to 1212203 its reverse (3022121), we get a palindrome (4234324).

The spelling of 1212203 in words is "one million, two hundred twelve thousand, two hundred three".