1121304203 has 16 divisors (see below), whose sum is σ = 1182444480. Its totient is φ = 1061913600.

The previous prime is 1121304179. The next prime is 1121304229. The reversal of 1121304203 is 3024031211.

It is a cyclic number.

It is not a de Polignac number, because 1121304203 - 2⁸ = 1121303947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121303203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272323 + ... + 1273203.

It is an arithmetic number, because the mean of its divisors is an integer number (73902780).

Almost surely, 2^1121304203 is an apocalyptic number.

1121304203 is a deficient number, since it is larger than the sum of its proper divisors (61140277).

1121304203 is an equidigital number, since it uses as much as digits as its factorization.

1121304203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1121304203 is about 33485.8806514029. The cubic root of 1121304203 is about 1038.9017631957.

Adding to 1121304203 its reverse (3024031211), we get a palindrome (4145335414).

The spelling of 1121304203 in words is "one billion, one hundred twenty-one million, three hundred four thousand, two hundred three".