1131224213 has 8 divisors (see below), whose sum is σ = 1293512640. Its totient is φ = 969107040.

The previous prime is 1131224173. The next prime is 1131224233. The reversal of 1131224213 is 3124221311.

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 1131224213 - 2¹⁰ = 1131223189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131224233) 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, 28328 + ... + 55361.

It is an arithmetic number, because the mean of its divisors is an integer number (161689080).

Almost surely, 2^1131224213 is an apocalyptic number.

It is an amenable number.

1131224213 is a deficient number, since it is larger than the sum of its proper divisors (162288427).

1131224213 is an equidigital number, since it uses as much as digits as its factorization.

1131224213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85627.

The product of its digits is 288, while the sum is 20.

The square root of 1131224213 is about 33633.6767689767. The cubic root of 1131224213 is about 1041.9564420596.

Adding to 1131224213 its reverse (3124221311), we get a palindrome (4255445524).

The spelling of 1131224213 in words is "one billion, one hundred thirty-one million, two hundred twenty-four thousand, two hundred thirteen".