1121221303 has 4 divisors (see below), whose sum is σ = 1121612560. Its totient is φ = 1120830048.

The previous prime is 1121221291. The next prime is 1121221373. The reversal of 1121221303 is 3031221211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3031221211 = 61 ⋅49692151.

It is a cyclic number.

It is not a de Polignac number, because 1121221303 - 2⁹ = 1121220791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121221373) 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 3 ways as a sum of consecutive naturals, for example, 191298 + ... + 197071.

It is an arithmetic number, because the mean of its divisors is an integer number (280403140).

Almost surely, 2^1121221303 is an apocalyptic number.

1121221303 is a deficient number, since it is larger than the sum of its proper divisors (391257).

1121221303 is an equidigital number, since it uses as much as digits as its factorization.

1121221303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391256.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1121221303 is about 33484.6427933762. The cubic root of 1121221303 is about 1038.8761599507.

Adding to 1121221303 its reverse (3031221211), we get a palindrome (4152442514).

The spelling of 1121221303 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, three hundred three".