1131213323 has 4 divisors (see below), whose sum is σ = 1133121528. Its totient is φ = 1129305120.

The previous prime is 1131213289. The next prime is 1131213331. The reversal of 1131213323 is 3233121311.

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

It is a cyclic number.

It is not a de Polignac number, because 1131213323 - 2⁸ = 1131213067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131213295 and 1131213304.

It is not an unprimeable number, because it can be changed into a prime (1131213373) 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, 953213 + ... + 954398.

It is an arithmetic number, because the mean of its divisors is an integer number (283280382).

Almost surely, 2^1131213323 is an apocalyptic number.

1131213323 is a deficient number, since it is larger than the sum of its proper divisors (1908205).

1131213323 is an equidigital number, since it uses as much as digits as its factorization.

1131213323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908204.

The product of its digits is 324, while the sum is 20.

The square root of 1131213323 is about 33633.5148772768. The cubic root of 1131213323 is about 1041.9530985014.

Adding to 1131213323 its reverse (3233121311), we get a palindrome (4364334634).

The spelling of 1131213323 in words is "one billion, one hundred thirty-one million, two hundred thirteen thousand, three hundred twenty-three".