1121320321 has 8 divisors (see below), whose sum is σ = 1287640800. Its totient is φ = 965730240.

The previous prime is 1121320297. The next prime is 1121320337. The reversal of 1121320321 is 1230231211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121320321 - 2¹¹ = 1121318273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121320295 and 1121320304.

It is not an unprimeable number, because it can be changed into a prime (1121321321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2682376 + ... + 2682793.

It is an arithmetic number, because the mean of its divisors is an integer number (160955100).

Almost surely, 2^1121320321 is an apocalyptic number.

1121320321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121320321 is a deficient number, since it is larger than the sum of its proper divisors (166320479).

1121320321 is a wasteful number, since it uses less digits than its factorization.

1121320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5365199.

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

The square root of 1121320321 is about 33486.1213191376. The cubic root of 1121320321 is about 1038.9067410118.

Adding to 1121320321 its reverse (1230231211), we get a palindrome (2351551532).

The spelling of 1121320321 in words is "one billion, one hundred twenty-one million, three hundred twenty thousand, three hundred twenty-one".