1121320305 has 24 divisors (see below), whose sum is σ = 2221282752. Its totient is φ = 512603424.

The previous prime is 1121320297. The next prime is 1121320337. The reversal of 1121320305 is 5030231211.

It is not a de Polignac number, because 1121320305 - 2³ = 1121320297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1779559 + ... + 1780188.

It is an arithmetic number, because the mean of its divisors is an integer number (92553448).

Almost surely, 2^1121320305 is an apocalyptic number.

1121320305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121320305 is a deficient number, since it is larger than the sum of its proper divisors (1099962447).

1121320305 is a wasteful number, since it uses less digits than its factorization.

1121320305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559765 (or 3559762 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1121320305 is about 33486.1210802326. The cubic root of 1121320305 is about 1038.9067360705.

Adding to 1121320305 its reverse (5030231211), we get a palindrome (6151551516).

The spelling of 1121320305 in words is "one billion, one hundred twenty-one million, three hundred twenty thousand, three hundred five".