1131133321 has 4 divisors (see below), whose sum is σ = 1146628372. Its totient is φ = 1115638272.

The previous prime is 1131133291. The next prime is 1131133343. The reversal of 1131133321 is 1233311311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 305375625 + 825757696 = 17475^2 + 28736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131133321 - 2⁷ = 1131133193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131133391) 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, 7747416 + ... + 7747561.

It is an arithmetic number, because the mean of its divisors is an integer number (286657093).

Almost surely, 2^1131133321 is an apocalyptic number.

It is an amenable number.

1131133321 is a deficient number, since it is larger than the sum of its proper divisors (15495051).

1131133321 is an equidigital number, since it uses as much as digits as its factorization.

1131133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15495050.

The product of its digits is 162, while the sum is 19.

The square root of 1131133321 is about 33632.3255366024. The cubic root of 1131133321 is about 1041.9285348182.

Adding to 1131133321 its reverse (1233311311), we get a palindrome (2364444632).

The spelling of 1131133321 in words is "one billion, one hundred thirty-one million, one hundred thirty-three thousand, three hundred twenty-one".