1131302321 has 4 divisors (see below), whose sum is σ = 1132052544. Its totient is φ = 1130552100.

The previous prime is 1131302233. The next prime is 1131302323. The reversal of 1131302321 is 1232031311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131302321 - 2¹⁴ = 1131285937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131302321.

It is not an unprimeable number, because it can be changed into a prime (1131302323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372845 + ... + 375866.

It is an arithmetic number, because the mean of its divisors is an integer number (283013136).

Almost surely, 2^1131302321 is an apocalyptic number.

It is an amenable number.

1131302321 is a deficient number, since it is larger than the sum of its proper divisors (750223).

1131302321 is an equidigital number, since it uses as much as digits as its factorization.

1131302321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750222.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1131302321 is about 33634.8379065516. The cubic root of 1131302321 is about 1041.9804229409.

Adding to 1131302321 its reverse (1232031311), we get a palindrome (2363333632).

The spelling of 1131302321 in words is "one billion, one hundred thirty-one million, three hundred two thousand, three hundred twenty-one".