1223121303 has 20 divisors (see below), whose sum is σ = 1834680408. Its totient is φ = 815401080.

The previous prime is 1223121299. The next prime is 1223121323. The reversal of 1223121303 is 3031213221.

It is not a de Polignac number, because 1223121303 - 2² = 1223121299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223121323) 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 19 ways as a sum of consecutive naturals, for example, 11388 + ... + 50753.

Almost surely, 2^1223121303 is an apocalyptic number.

1223121303 is a deficient number, since it is larger than the sum of its proper divisors (611559105).

1223121303 is an frugal number, since it uses more digits than its factorization.

1223121303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62168 (or 62144 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1223121303 is about 34973.1511734359. The cubic root of 1223121303 is about 1069.4402123279.

Adding to 1223121303 its reverse (3031213221), we get a palindrome (4254334524).

The spelling of 1223121303 in words is "one billion, two hundred twenty-three million, one hundred twenty-one thousand, three hundred three".