1121220303 has 24 divisors (see below), whose sum is σ = 1741299840. Its totient is φ = 639863280.

The previous prime is 1121220299. The next prime is 1121220311. The reversal of 1121220303 is 3030221211.

It is not a de Polignac number, because 1121220303 - 2² = 1121220299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220323) 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 23 ways as a sum of consecutive naturals, for example, 118788 + ... + 127878.

It is an arithmetic number, because the mean of its divisors is an integer number (72554160).

Almost surely, 2^1121220303 is an apocalyptic number.

1121220303 is a deficient number, since it is larger than the sum of its proper divisors (620079537).

1121220303 is an equidigital number, since it uses as much as digits as its factorization.

1121220303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9947 (or 9940 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1121220303 is about 33484.6278611544. The cubic root of 1121220303 is about 1038.8758510981.

Adding to 1121220303 its reverse (3030221211), we get a palindrome (4151441514).

The spelling of 1121220303 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, three hundred three".