1131303321 has 16 divisors (see below), whose sum is σ = 1682200320. Its totient is φ = 751414320.

The previous prime is 1131303319. The next prime is 1131303331. The reversal of 1131303321 is 1233031311.

It is a happy number.

1131303321 is a `hidden beast` number, since 11 + 31 + 303 + 321 = 666.

It is not a de Polignac number, because 1131303321 - 2¹ = 1131303319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131303294 and 1131303303.

It is not an unprimeable number, because it can be changed into a prime (1131303331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69990 + ... + 84623.

It is an arithmetic number, because the mean of its divisors is an integer number (105137520).

Almost surely, 2^1131303321 is an apocalyptic number.

It is an amenable number.

1131303321 is a deficient number, since it is larger than the sum of its proper divisors (550896999).

1131303321 is a wasteful number, since it uses less digits than its factorization.

1131303321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154893 (or 154887 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1131303321 is about 33634.8527720875. The cubic root of 1131303321 is about 1041.9807299558.

Adding to 1131303321 its reverse (1233031311), we get a palindrome (2364334632).

The spelling of 1131303321 in words is "one billion, one hundred thirty-one million, three hundred three thousand, three hundred twenty-one".